diff --git a/14_protocolbuffers/pb/example_01/go.mod b/14_protocolbuffers/pb/example_01/go.mod
index bf00e32..7575b00 100644
--- a/14_protocolbuffers/pb/example_01/go.mod
+++ b/14_protocolbuffers/pb/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_01
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_01/main.go b/14_protocolbuffers/pb/example_01/main.go
index 80daa40..307975a 100644
--- a/14_protocolbuffers/pb/example_01/main.go
+++ b/14_protocolbuffers/pb/example_01/main.go
@@ -1,26 +1,25 @@
 package main
 
 import (
-    "fmt"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_01/user"
-    "google.golang.org/protobuf/proto"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_01/user"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    u := user.User{Email:"john@gmail.com", UserId: "John"}
+	u := user.User{Email: "john@gmail.com", UserId: "John"}
 
-    fmt.Println("To encode:", u.String())
-    encoded, err := proto.Marshal(&u)
-    if err != nil {
-        panic(err)
-    }
+	fmt.Println("To encode:", u.String())
+	encoded, err := proto.Marshal(&u)
+	if err != nil {
+		panic(err)
+	}
 
-    v := user.User{}
-    err = proto.Unmarshal(encoded, &v)
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("Recovered:", v.String())
+	v := user.User{}
+	err = proto.Unmarshal(encoded, &v)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Recovered:", v.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_01/user.proto b/14_protocolbuffers/pb/example_01/user.proto
index b605262..d20e834 100644
--- a/14_protocolbuffers/pb/example_01/user.proto
+++ b/14_protocolbuffers/pb/example_01/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_01/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_01/user";
 
 message User {
     string user_id = 1;
diff --git a/14_protocolbuffers/pb/example_02/go.mod b/14_protocolbuffers/pb/example_02/go.mod
index bb0532f..71fe726 100644
--- a/14_protocolbuffers/pb/example_02/go.mod
+++ b/14_protocolbuffers/pb/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_02
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_02/main.go b/14_protocolbuffers/pb/example_02/main.go
index 31282a1..eec5443 100644
--- a/14_protocolbuffers/pb/example_02/main.go
+++ b/14_protocolbuffers/pb/example_02/main.go
@@ -1,29 +1,28 @@
 package main
 
 import (
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_02/user"
-    "google.golang.org/protobuf/proto"
-    "fmt"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_02/user"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    userA := user.User{UserId: "John", Email: "john@gmail.com"}
-    userB := user.User{UserId: "Mary", Email:"mary@gmail.com"}
+	userA := user.User{UserId: "John", Email: "john@gmail.com"}
+	userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
 
-    g := user.Group{Id: 1,
-        Score: 42.0,
-        Category: user.Category_DEVELOPER,
-        Users: []*user.User{&userA,&userB},
-    }
-    fmt.Println("To encode:", g.String())
+	g := user.Group{Id: 1,
+		Score:    42.0,
+		Category: user.Category_DEVELOPER,
+		Users:    []*user.User{&userA, &userB},
+	}
+	fmt.Println("To encode:", g.String())
 
-    encoded, err := proto.Marshal(&g)
-    if err != nil {
-        panic(err)
-    }
-    recovered := user.Group{}
-    err = proto.Unmarshal(encoded, &recovered)
-    fmt.Println("Recovered:", recovered.String())
+	encoded, err := proto.Marshal(&g)
+	if err != nil {
+		panic(err)
+	}
+	recovered := user.Group{}
+	err = proto.Unmarshal(encoded, &recovered)
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_02/user.proto b/14_protocolbuffers/pb/example_02/user.proto
index 445c137..1b81dcb 100644
--- a/14_protocolbuffers/pb/example_02/user.proto
+++ b/14_protocolbuffers/pb/example_02/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_02/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_02/user";
 
 message User {
     string user_id = 1;
diff --git a/14_protocolbuffers/pb/example_03/go.mod b/14_protocolbuffers/pb/example_03/go.mod
index 1a8c67f..0add49d 100644
--- a/14_protocolbuffers/pb/example_03/go.mod
+++ b/14_protocolbuffers/pb/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_03/group.proto b/14_protocolbuffers/pb/example_03/group.proto
index 8c402f8..20bac97 100644
--- a/14_protocolbuffers/pb/example_03/group.proto
+++ b/14_protocolbuffers/pb/example_03/group.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package group;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03/group";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03/group";
 
 import "user.proto";
 
diff --git a/14_protocolbuffers/pb/example_03/group/group.pb.go b/14_protocolbuffers/pb/example_03/group/group.pb.go
index 943bd45..b35a787 100644
--- a/14_protocolbuffers/pb/example_03/group/group.pb.go
+++ b/14_protocolbuffers/pb/example_03/group/group.pb.go
@@ -8,7 +8,7 @@ package group
 
 import (
 	proto "github.com/golang/protobuf/proto"
-	user "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03/user"
+	user "github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03/user"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
diff --git a/14_protocolbuffers/pb/example_03/main.go b/14_protocolbuffers/pb/example_03/main.go
index d2dd23f..1405613 100644
--- a/14_protocolbuffers/pb/example_03/main.go
+++ b/14_protocolbuffers/pb/example_03/main.go
@@ -1,30 +1,29 @@
 package main
 
 import (
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03/group"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03/user"
-    "google.golang.org/protobuf/proto"
-    "fmt"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03/group"
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03/user"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    userA := user.User{UserId: "John", Email: "john@gmail.com"}
-    userB := user.User{UserId: "Mary", Email:"mary@gmail.com"}
+	userA := user.User{UserId: "John", Email: "john@gmail.com"}
+	userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
 
-    g := group.Group{Id: 1,
-        Score: 42.0,
-        Category: group.Category_DEVELOPER,
-        Users: []*user.User{&userA,&userB},
-    }
-    fmt.Println("To encode:", g.String())
+	g := group.Group{Id: 1,
+		Score:    42.0,
+		Category: group.Category_DEVELOPER,
+		Users:    []*user.User{&userA, &userB},
+	}
+	fmt.Println("To encode:", g.String())
 
-    encoded, err := proto.Marshal(&g)
-    if err != nil {
-        panic(err)
-    }
-    recovered := group.Group{}
-    err = proto.Unmarshal(encoded, &recovered)
-    fmt.Println("Recovered:", recovered.String())
+	encoded, err := proto.Marshal(&g)
+	if err != nil {
+		panic(err)
+	}
+	recovered := group.Group{}
+	err = proto.Unmarshal(encoded, &recovered)
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_03/user.proto b/14_protocolbuffers/pb/example_03/user.proto
index b8097b9..7615e66 100644
--- a/14_protocolbuffers/pb/example_03/user.proto
+++ b/14_protocolbuffers/pb/example_03/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_03/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_03/user";
 
 message User {
     string user_id = 1;
diff --git a/14_protocolbuffers/pb/example_04/go.mod b/14_protocolbuffers/pb/example_04/go.mod
index 548f930..d8f684b 100644
--- a/14_protocolbuffers/pb/example_04/go.mod
+++ b/14_protocolbuffers/pb/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_04
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_04/group.proto b/14_protocolbuffers/pb/example_04/group.proto
index afe8260..097c8bc 100644
--- a/14_protocolbuffers/pb/example_04/group.proto
+++ b/14_protocolbuffers/pb/example_04/group.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package group;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_04/group";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_04/group";
 
 enum Category {
     DEVELOPER = 0;
diff --git a/14_protocolbuffers/pb/example_04/main.go b/14_protocolbuffers/pb/example_04/main.go
index 98af3de..76108a0 100644
--- a/14_protocolbuffers/pb/example_04/main.go
+++ b/14_protocolbuffers/pb/example_04/main.go
@@ -1,28 +1,28 @@
 package main
+
 import (
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_04/group"
-    "google.golang.org/protobuf/proto"
-    "fmt"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_04/group"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    userA := group.Group_User{UserId: "John", Email: "john@gmail.com"}
-    userB := group.Group_User{UserId: "Mary", Email:"mary@gmail.com"}
+	userA := group.Group_User{UserId: "John", Email: "john@gmail.com"}
+	userB := group.Group_User{UserId: "Mary", Email: "mary@gmail.com"}
 
-    g := group.Group{Id: 1,
-        Score: 42.0,
-        Category: group.Category_DEVELOPER,
-        Users: []*group.Group_User{&userA, &userB},
-    }
-    fmt.Println("To encode:", g.String())
+	g := group.Group{Id: 1,
+		Score:    42.0,
+		Category: group.Category_DEVELOPER,
+		Users:    []*group.Group_User{&userA, &userB},
+	}
+	fmt.Println("To encode:", g.String())
 
-    encoded, err := proto.Marshal(&g)
-    if err != nil {
-        panic(err)
-    }
-    recovered := group.Group{}
-    err = proto.Unmarshal(encoded, &recovered)
-    fmt.Println("Recovered:", recovered.String())
+	encoded, err := proto.Marshal(&g)
+	if err != nil {
+		panic(err)
+	}
+	recovered := group.Group{}
+	err = proto.Unmarshal(encoded, &recovered)
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_05/go.mod b/14_protocolbuffers/pb/example_05/go.mod
index 1861253..5a91c02 100644
--- a/14_protocolbuffers/pb/example_05/go.mod
+++ b/14_protocolbuffers/pb/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_05
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_05/main.go b/14_protocolbuffers/pb/example_05/main.go
index 0eb6659..17d8e00 100644
--- a/14_protocolbuffers/pb/example_05/main.go
+++ b/14_protocolbuffers/pb/example_05/main.go
@@ -1,25 +1,24 @@
 package main
 
 import (
-    "fmt"
-    "google.golang.org/protobuf/proto"
-    "google.golang.org/protobuf/types/known/anypb"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_05/user"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_05/user"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/anypb"
 )
 
 func main() {
-    info := anypb.Any{Value: []byte(`John rules`), TypeUrl: "urltype"}
-    userA := user.User{UserId: "John", Email: "john@gmail.com", Info: []*anypb.Any{&info}}
-    anypb.a
-    fmt.Println("To encode:", userA.String())
+	info := anypb.Any{Value: []byte(`John rules`), TypeUrl: "urltype"}
+	userA := user.User{UserId: "John", Email: "john@gmail.com", Info: []*anypb.Any{&info}}
+	anypb.a
+	fmt.Println("To encode:", userA.String())
 
-    encoded, err := proto.Marshal(&userA)
-    if err != nil {
-        panic(err)
-    }
-    recovered := user.User{}
-    err = proto.Unmarshal(encoded, &recovered)
-    fmt.Println("Recovered:", recovered.String())
+	encoded, err := proto.Marshal(&userA)
+	if err != nil {
+		panic(err)
+	}
+	recovered := user.User{}
+	err = proto.Unmarshal(encoded, &recovered)
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_05/user.proto b/14_protocolbuffers/pb/example_05/user.proto
index d192c97..c33abeb 100644
--- a/14_protocolbuffers/pb/example_05/user.proto
+++ b/14_protocolbuffers/pb/example_05/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_05/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_05/user";
 
 import "google/protobuf/any.proto";
 
diff --git a/14_protocolbuffers/pb/example_06/go.mod b/14_protocolbuffers/pb/example_06/go.mod
index 1cb71ff..3652a5f 100644
--- a/14_protocolbuffers/pb/example_06/go.mod
+++ b/14_protocolbuffers/pb/example_06/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_06
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_06
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_06/main.go b/14_protocolbuffers/pb/example_06/main.go
index aa69f2f..6904400 100644
--- a/14_protocolbuffers/pb/example_06/main.go
+++ b/14_protocolbuffers/pb/example_06/main.go
@@ -1,39 +1,38 @@
 package main
 
 import (
-    "fmt"
-    "google.golang.org/protobuf/proto"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_06/user"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_06/user"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    goDeveloper := user.Developer{Language: "go"}
-    userA := user.User{UserId: "John", Email: "john@gmail.com",
-        Type: &user.User_Developer{&goDeveloper}}
-    aksOperator := user.Operator{Platform: "aks"}
-    userB := user.User{UserId: "Mary", Email: "mary@gmail.com",
-        Type: &user.User_Operator{&aksOperator}}
+	goDeveloper := user.Developer{Language: "go"}
+	userA := user.User{UserId: "John", Email: "john@gmail.com",
+		Type: &user.User_Developer{&goDeveloper}}
+	aksOperator := user.Operator{Platform: "aks"}
+	userB := user.User{UserId: "Mary", Email: "mary@gmail.com",
+		Type: &user.User_Operator{&aksOperator}}
 
-    encodedA, err := proto.Marshal(&userA)
-    if err != nil {
-        panic(err)
-    }
-    encodedB, err := proto.Marshal(&userB)
-    if err != nil {
-        panic(err)
-    }
+	encodedA, err := proto.Marshal(&userA)
+	if err != nil {
+		panic(err)
+	}
+	encodedB, err := proto.Marshal(&userB)
+	if err != nil {
+		panic(err)
+	}
 
-    recoveredA, recoveredB := user.User{}, user.User{}
-    err = proto.Unmarshal(encodedA, &recoveredA)
-    if err != nil {
-        panic(err)
-    }
-    err = proto.Unmarshal(encodedB, &recoveredB)
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("RecoveredA:", recoveredA.String())
-    fmt.Println("RecoveredB:", recoveredB.String())
+	recoveredA, recoveredB := user.User{}, user.User{}
+	err = proto.Unmarshal(encodedA, &recoveredA)
+	if err != nil {
+		panic(err)
+	}
+	err = proto.Unmarshal(encodedB, &recoveredB)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("RecoveredA:", recoveredA.String())
+	fmt.Println("RecoveredB:", recoveredB.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_06/user.proto b/14_protocolbuffers/pb/example_06/user.proto
index 5dd86e4..259d1d5 100644
--- a/14_protocolbuffers/pb/example_06/user.proto
+++ b/14_protocolbuffers/pb/example_06/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_06/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_06/user";
 
 message Developer {
     string language = 1;
diff --git a/14_protocolbuffers/pb/example_07/go.mod b/14_protocolbuffers/pb/example_07/go.mod
index 1228852..c06ee85 100644
--- a/14_protocolbuffers/pb/example_07/go.mod
+++ b/14_protocolbuffers/pb/example_07/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_07
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_07
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_07/main.go b/14_protocolbuffers/pb/example_07/main.go
index d9e653b..f3a76e5 100644
--- a/14_protocolbuffers/pb/example_07/main.go
+++ b/14_protocolbuffers/pb/example_07/main.go
@@ -1,34 +1,33 @@
 package main
 
 import (
-    "fmt"
-    "google.golang.org/protobuf/proto"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_07/user"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_07/user"
+	"google.golang.org/protobuf/proto"
 )
 
 func main() {
-    userA := user.User{UserId: "John", Email: "john@gmail.com"}
-    userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
-
-    teams := map[string]*user.UserList {
-        "teamA": &user.UserList{Users:[]*user.User{&userA,&userB}},
-        "teamB": nil,
-    }
-
-    teamsPB := user.Teams{Teams: teams}
-
-    fmt.Println("To encode:", teamsPB.String())
-
-    encoded, err := proto.Marshal(&teamsPB)
-    if err != nil {
-        panic(err)
-    }
-    recovered := user.Teams{}
-    err = proto.Unmarshal(encoded, &recovered)
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("Recovered:", recovered.String())
+	userA := user.User{UserId: "John", Email: "john@gmail.com"}
+	userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
+
+	teams := map[string]*user.UserList{
+		"teamA": &user.UserList{Users: []*user.User{&userA, &userB}},
+		"teamB": nil,
+	}
+
+	teamsPB := user.Teams{Teams: teams}
+
+	fmt.Println("To encode:", teamsPB.String())
+
+	encoded, err := proto.Marshal(&teamsPB)
+	if err != nil {
+		panic(err)
+	}
+	recovered := user.Teams{}
+	err = proto.Unmarshal(encoded, &recovered)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_07/user.proto b/14_protocolbuffers/pb/example_07/user.proto
index 80e4d98..1689578 100644
--- a/14_protocolbuffers/pb/example_07/user.proto
+++ b/14_protocolbuffers/pb/example_07/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_07/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_07/user";
 
 message User {
     string user_id = 1;
diff --git a/14_protocolbuffers/pb/example_08/go.mod b/14_protocolbuffers/pb/example_08/go.mod
index f0c86d8..a36effa 100644
--- a/14_protocolbuffers/pb/example_08/go.mod
+++ b/14_protocolbuffers/pb/example_08/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_08
+module github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_08
 
 go 1.15
 
diff --git a/14_protocolbuffers/pb/example_08/main.go b/14_protocolbuffers/pb/example_08/main.go
index 644ca0d..1f125f0 100644
--- a/14_protocolbuffers/pb/example_08/main.go
+++ b/14_protocolbuffers/pb/example_08/main.go
@@ -1,32 +1,31 @@
 package main
 
 import (
-    "encoding/json"
-    "fmt"
-    "github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_08/user"
+	"encoding/json"
+	"fmt"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_08/user"
 )
 
 func main() {
-    userA := user.User{UserId: "John", Email: "john@gmail.com"}
-    userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
+	userA := user.User{UserId: "John", Email: "john@gmail.com"}
+	userB := user.User{UserId: "Mary", Email: "mary@gmail.com"}
 
-    teams := map[string]*user.UserList {
-        "teamA": &user.UserList{Users:[]*user.User{&userA,&userB}},
-        "teamB": nil,
-    }
+	teams := map[string]*user.UserList{
+		"teamA": &user.UserList{Users: []*user.User{&userA, &userB}},
+		"teamB": nil,
+	}
 
-    teamsPB := user.Teams{Teams: teams}
+	teamsPB := user.Teams{Teams: teams}
 
-    encoded, err := json.Marshal(&teamsPB)
-    if err != nil {
-        panic(err)
-    }
-    recovered := user.Teams{}
-    err = json.Unmarshal(encoded, &recovered)
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("Recovered:", recovered.String())
+	encoded, err := json.Marshal(&teamsPB)
+	if err != nil {
+		panic(err)
+	}
+	recovered := user.Teams{}
+	err = json.Unmarshal(encoded, &recovered)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Recovered:", recovered.String())
 }
-
-
diff --git a/14_protocolbuffers/pb/example_08/user.proto b/14_protocolbuffers/pb/example_08/user.proto
index 8e4be46..704d1e8 100644
--- a/14_protocolbuffers/pb/example_08/user.proto
+++ b/14_protocolbuffers/pb/example_08/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/12_protocolbuffers/pb/example_08/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/14_protocolbuffers/pb/example_08/user";
 
 message User {
     string user_id = 1;
diff --git a/15_grpc/grpc/example_01/client/client.go b/15_grpc/grpc/example_01/client/client.go
index 2ec0566..a1e5b2a 100644
--- a/15_grpc/grpc/example_01/client/client.go
+++ b/15_grpc/grpc/example_01/client/client.go
@@ -1,29 +1,29 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user"
-    "google.golang.org/grpc"
-    "time"
+	"context"
+	"fmt"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user"
+	"google.golang.org/grpc"
 )
 
 func main() {
-    conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure(), grpc.WithBlock())
-    if err != nil {
-        panic(err)
-    }
-    defer conn.Close()
+	conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
 
-    c := pb.NewUserServiceClient(conn)
+	c := pb.NewUserServiceClient(conn)
 
-    ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-    defer cancel()
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
 
-    r, err := c.GetUser(ctx, &pb.UserRequest{UserId: "John"})
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("Client received:", r.String())
+	r, err := c.GetUser(ctx, &pb.UserRequest{UserId: "John"})
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Client received:", r.String())
 }
-
diff --git a/15_grpc/grpc/example_01/go.mod b/15_grpc/grpc/example_01/go.mod
index 4e7d790..c072798 100644
--- a/15_grpc/grpc/example_01/go.mod
+++ b/15_grpc/grpc/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01
 
 go 1.15
 
diff --git a/15_grpc/grpc/example_01/server/server.go b/15_grpc/grpc/example_01/server/server.go
index 590484a..65347dd 100644
--- a/15_grpc/grpc/example_01/server/server.go
+++ b/15_grpc/grpc/example_01/server/server.go
@@ -1,31 +1,32 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user"
-    "google.golang.org/grpc"
-    "net"
+	"context"
+	"fmt"
+	"net"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user"
+	"google.golang.org/grpc"
 )
 
-type UserServer struct{
-    pb.UnimplementedUserServiceServer
+type UserServer struct {
+	pb.UnimplementedUserServiceServer
 }
 
 func (u *UserServer) GetUser(ctx context.Context, req *pb.UserRequest) (*pb.User, error) {
-    fmt.Println("Server received:", req.String())
-    return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
+	fmt.Println("Server received:", req.String())
+	return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
-    pb.RegisterUserServiceServer(s, &UserServer{})
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterUserServiceServer(s, &UserServer{})
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/grpc/example_01/user.proto b/15_grpc/grpc/example_01/user.proto
index 2210465..0fb91bc 100644
--- a/15_grpc/grpc/example_01/user.proto
+++ b/15_grpc/grpc/example_01/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user";
 
 message User {
     string user_id = 1;
diff --git a/15_grpc/interceptors/example_01/client/client.go b/15_grpc/interceptors/example_01/client/client.go
index 55de08a..6e8f722 100644
--- a/15_grpc/interceptors/example_01/client/client.go
+++ b/15_grpc/interceptors/example_01/client/client.go
@@ -1,31 +1,31 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_01/user"
-    "google.golang.org/grpc"
-    "google.golang.org/grpc/metadata"
-    "time"
+	"context"
+	"fmt"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_01/user"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
 )
 
 func main() {
-    conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure(), grpc.WithBlock())
-    if err != nil {
-        panic(err)
-    }
-    defer conn.Close()
+	conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
 
-    c := pb.NewUserServiceClient(conn)
+	c := pb.NewUserServiceClient(conn)
 
-    ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-    ctx = metadata.AppendToOutgoingContext(ctx, "password","go")
-    defer cancel()
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	ctx = metadata.AppendToOutgoingContext(ctx, "password", "go")
+	defer cancel()
 
-    r, err := c.GetUser(ctx, &pb.UserRequest{UserId: "John"})
-    if err != nil {
-        panic(err)
-    }
-    fmt.Println("Client received:", r.String())
+	r, err := c.GetUser(ctx, &pb.UserRequest{UserId: "John"})
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Client received:", r.String())
 }
-
diff --git a/15_grpc/interceptors/example_01/go.mod b/15_grpc/interceptors/example_01/go.mod
index 29454a7..8cde9b9 100644
--- a/15_grpc/interceptors/example_01/go.mod
+++ b/15_grpc/interceptors/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_01
 
 go 1.15
 
diff --git a/15_grpc/interceptors/example_01/server/server.go b/15_grpc/interceptors/example_01/server/server.go
index 5814854..ec8802a 100644
--- a/15_grpc/interceptors/example_01/server/server.go
+++ b/15_grpc/interceptors/example_01/server/server.go
@@ -3,12 +3,13 @@ package main
 import (
 	"context"
 	"fmt"
-	pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_01/user"
+	"net"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_01/user"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
-	"net"
 )
 
 type UserServer struct {
diff --git a/15_grpc/interceptors/example_01/user.proto b/15_grpc/interceptors/example_01/user.proto
index 5fd1e94..06a4757 100644
--- a/15_grpc/interceptors/example_01/user.proto
+++ b/15_grpc/interceptors/example_01/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_01/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_01/user";
 
 message User {
     string user_id = 1;
diff --git a/15_grpc/interceptors/example_02/client/client.go b/15_grpc/interceptors/example_02/client/client.go
index b639ae8..db1d99f 100644
--- a/15_grpc/interceptors/example_02/client/client.go
+++ b/15_grpc/interceptors/example_02/client/client.go
@@ -3,11 +3,12 @@ package main
 import (
 	"context"
 	"fmt"
-	pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_02/user"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/metadata"
 	"runtime"
 	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_02/user"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
 )
 
 func ClientLoggerInterceptor(
diff --git a/15_grpc/interceptors/example_02/go.mod b/15_grpc/interceptors/example_02/go.mod
index 6ba7fc9..f0f62f6 100644
--- a/15_grpc/interceptors/example_02/go.mod
+++ b/15_grpc/interceptors/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_02
 
 go 1.15
 
diff --git a/15_grpc/interceptors/example_02/server/server.go b/15_grpc/interceptors/example_02/server/server.go
index 9c53264..b7e99fe 100644
--- a/15_grpc/interceptors/example_02/server/server.go
+++ b/15_grpc/interceptors/example_02/server/server.go
@@ -1,52 +1,52 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_02/user"
-    "google.golang.org/grpc"
-    "google.golang.org/grpc/metadata"
-    "net"
+	"context"
+	"fmt"
+	"net"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_02/user"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
 )
 
-type UserServer struct{
-    pb.UnimplementedUserServiceServer
+type UserServer struct {
+	pb.UnimplementedUserServiceServer
 }
 
 func (u *UserServer) GetUser(ctx context.Context, req *pb.UserRequest) (*pb.User, error) {
-    fmt.Println("Server received:", req.String())
-    return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
+	fmt.Println("Server received:", req.String())
+	return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
 }
 
 func RequestLoggerInterceptor(ctx context.Context,
-    req interface{},
-    info *grpc.UnaryServerInfo,
-    handler grpc.UnaryHandler) (interface{}, error){
-        md, found := metadata.FromIncomingContext(ctx)
-        if found {
-            os, _ := md["os"]
-            zone, _ := md["zone"]
-            fmt.Printf("Request from %s using %s\n", zone, os)
-        }
-
-        h, err := handler(ctx, req)
-        return h, err
+	req interface{},
+	info *grpc.UnaryServerInfo,
+	handler grpc.UnaryHandler) (interface{}, error) {
+	md, found := metadata.FromIncomingContext(ctx)
+	if found {
+		os, _ := md["os"]
+		zone, _ := md["zone"]
+		fmt.Printf("Request from %s using %s\n", zone, os)
+	}
+
+	h, err := handler(ctx, req)
+	return h, err
 }
 
 func withRequestLoggerInterceptor() grpc.ServerOption {
-    return grpc.UnaryInterceptor(RequestLoggerInterceptor)
+	return grpc.UnaryInterceptor(RequestLoggerInterceptor)
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer(withRequestLoggerInterceptor())
-    pb.RegisterUserServiceServer(s, &UserServer{})
-
-
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer(withRequestLoggerInterceptor())
+	pb.RegisterUserServiceServer(s, &UserServer{})
+
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/interceptors/example_02/user.proto b/15_grpc/interceptors/example_02/user.proto
index a51699f..b771543 100644
--- a/15_grpc/interceptors/example_02/user.proto
+++ b/15_grpc/interceptors/example_02/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/interceptors/example_02/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/interceptors/example_02/user";
 
 message User {
     string user_id = 1;
diff --git a/15_grpc/streaming/example_01/client/client.go b/15_grpc/streaming/example_01/client/client.go
index 67d0e38..84a53ee 100644
--- a/15_grpc/streaming/example_01/client/client.go
+++ b/15_grpc/streaming/example_01/client/client.go
@@ -1,46 +1,46 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_01/numbers"
-    "google.golang.org/grpc"
-    "io"
-    "time"
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_01/numbers"
+	"google.golang.org/grpc"
 )
 
 func main() {
-    conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
-    if err != nil {
-        panic(err)
-    }
-    defer conn.Close()
+	conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
 
-    c := pb.NewNumServiceClient(conn)
+	c := pb.NewNumServiceClient(conn)
 
-    ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
-    defer cancel()
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	defer cancel()
 
-    stream, err := c.Rnd(ctx, &pb.NumRequest{N:5, From:0, To: 100})
-    if err != nil {
-        panic(err)
-    }
+	stream, err := c.Rnd(ctx, &pb.NumRequest{N: 5, From: 0, To: 100})
+	if err != nil {
+		panic(err)
+	}
 
-    done := make(chan bool)
-    go func() {
-        for {
-            resp, err := stream.Recv()
-            if err == io.EOF {
-                done <- true
-                return
-            }
-            if err != nil {
-                panic(err)
-            }
-            fmt.Println("Received:", resp.String())
-        }
-    }()
-    <- done
-    fmt.Println("Client done")
+	done := make(chan bool)
+	go func() {
+		for {
+			resp, err := stream.Recv()
+			if err == io.EOF {
+				done <- true
+				return
+			}
+			if err != nil {
+				panic(err)
+			}
+			fmt.Println("Received:", resp.String())
+		}
+	}()
+	<-done
+	fmt.Println("Client done")
 }
-
diff --git a/15_grpc/streaming/example_01/go.mod b/15_grpc/streaming/example_01/go.mod
index 40c0bfb..48004f9 100644
--- a/15_grpc/streaming/example_01/go.mod
+++ b/15_grpc/streaming/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_01
 
 go 1.15
 
diff --git a/15_grpc/streaming/example_01/numbers.proto b/15_grpc/streaming/example_01/numbers.proto
index 7900aff..5cb731c 100644
--- a/15_grpc/streaming/example_01/numbers.proto
+++ b/15_grpc/streaming/example_01/numbers.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package numbers;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_01/numbers";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_01/numbers";
 
 message NumRequest {
     int64 from = 1;
diff --git a/15_grpc/streaming/example_01/server/server.go b/15_grpc/streaming/example_01/server/server.go
index a4b6927..5c39685 100644
--- a/15_grpc/streaming/example_01/server/server.go
+++ b/15_grpc/streaming/example_01/server/server.go
@@ -1,51 +1,52 @@
 package main
 
 import (
-    "errors"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_01/numbers"
-    "google.golang.org/grpc"
-    "math/rand"
-    "net"
-    "time"
+	"errors"
+	"fmt"
+	"math/rand"
+	"net"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_01/numbers"
+	"google.golang.org/grpc"
 )
 
-type NumServer struct{
-    pb.UnimplementedNumServiceServer
+type NumServer struct {
+	pb.UnimplementedNumServiceServer
 }
 
 func (n *NumServer) Rnd(req *pb.NumRequest, stream pb.NumService_RndServer) error {
-    fmt.Println(req.String())
-    if req.N <= 0 {
-        return errors.New("N must be greater than zero")
-    }
-    if req.To <= req.From {
-        return errors.New("to must be greater or equal than from")
-    }
-    done := make(chan bool)
-    go func() {
-        for counter:=0;counter<int(req.N);counter++{
-            i := rand.Intn(int(req.To) - int(req.From) +1) + int(req.To)
-            resp := pb.NumResponse{I:int64(i), Remaining:req.N-int64(counter)}
-            stream.Send(&resp)
-            time.Sleep(time.Second)
-        }
-        done <- true
-    }()
-    <- done
-    return nil
+	fmt.Println(req.String())
+	if req.N <= 0 {
+		return errors.New("N must be greater than zero")
+	}
+	if req.To <= req.From {
+		return errors.New("to must be greater or equal than from")
+	}
+	done := make(chan bool)
+	go func() {
+		for counter := 0; counter < int(req.N); counter++ {
+			i := rand.Intn(int(req.To)-int(req.From)+1) + int(req.To)
+			resp := pb.NumResponse{I: int64(i), Remaining: req.N - int64(counter)}
+			stream.Send(&resp)
+			time.Sleep(time.Second)
+		}
+		done <- true
+	}()
+	<-done
+	return nil
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
 
-    pb.RegisterNumServiceServer(s, &NumServer{})
+	pb.RegisterNumServiceServer(s, &NumServer{})
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/streaming/example_02/client/client.go b/15_grpc/streaming/example_02/client/client.go
index 0578e7a..eb8f319 100644
--- a/15_grpc/streaming/example_02/client/client.go
+++ b/15_grpc/streaming/example_02/client/client.go
@@ -1,43 +1,43 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_02/numbers"
-    "google.golang.org/grpc"
-    "time"
+	"context"
+	"fmt"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_02/numbers"
+	"google.golang.org/grpc"
 )
 
 func main() {
-    conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
-    if err != nil {
-        panic(err)
-    }
-    defer conn.Close()
-
-    c := pb.NewNumServiceClient(conn)
-
-    ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
-    defer cancel()
-
-    stream, err := c.Sum(ctx)
-    if err != nil {
-        panic(err)
-    }
-
-    from, to := 1,100
-
-    for i:=from;i<=to;i++ {
-        err = stream.Send(&pb.NumRequest{X:int64(i)})
-        if err!= nil {
-            panic(err)
-        }
-    }
-    fmt.Println("Waiting for response...")
-    result, err := stream.CloseAndRecv()
-    if err != nil {
-        panic(err)
-    }
-    fmt.Printf("The sum from %d to %d is %d\n", from,to, result.Total)
+	conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+
+	c := pb.NewNumServiceClient(conn)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	defer cancel()
+
+	stream, err := c.Sum(ctx)
+	if err != nil {
+		panic(err)
+	}
+
+	from, to := 1, 100
+
+	for i := from; i <= to; i++ {
+		err = stream.Send(&pb.NumRequest{X: int64(i)})
+		if err != nil {
+			panic(err)
+		}
+	}
+	fmt.Println("Waiting for response...")
+	result, err := stream.CloseAndRecv()
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("The sum from %d to %d is %d\n", from, to, result.Total)
 }
-
diff --git a/15_grpc/streaming/example_02/go.mod b/15_grpc/streaming/example_02/go.mod
index cdc39fd..346c08b 100644
--- a/15_grpc/streaming/example_02/go.mod
+++ b/15_grpc/streaming/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_02
 
 go 1.15
 
diff --git a/15_grpc/streaming/example_02/numbers.proto b/15_grpc/streaming/example_02/numbers.proto
index 3ab0b01..f3d15e2 100644
--- a/15_grpc/streaming/example_02/numbers.proto
+++ b/15_grpc/streaming/example_02/numbers.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package numbers;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_02/numbers";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_02/numbers";
 
 message NumRequest {
     int64 x = 1;
diff --git a/15_grpc/streaming/example_02/server/server.go b/15_grpc/streaming/example_02/server/server.go
index f950fbd..0f92982 100644
--- a/15_grpc/streaming/example_02/server/server.go
+++ b/15_grpc/streaming/example_02/server/server.go
@@ -1,47 +1,48 @@
 package main
 
 import (
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_02/numbers"
-    "google.golang.org/grpc"
-    "io"
-    "net"
+	"fmt"
+	"io"
+	"net"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_02/numbers"
+	"google.golang.org/grpc"
 )
 
-type NumServer struct{
-    pb.UnimplementedNumServiceServer
+type NumServer struct {
+	pb.UnimplementedNumServiceServer
 }
 
 func (n *NumServer) Sum(stream pb.NumService_SumServer) error {
-    var total int64 = 0
-    var counter int = 0
-    for {
-       next, err := stream.Recv()
-       if err == io.EOF {
-           fmt.Printf("Received %d numbers sum: %d\n",counter,total)
-           stream.SendAndClose(&pb.NumResponse{Total: total})
-           return nil
-       }
-       if err != nil {
-           return err
-       }
-       total = total + next.X
-       counter++
-    }
-
-    return nil
+	var total int64 = 0
+	var counter int = 0
+	for {
+		next, err := stream.Recv()
+		if err == io.EOF {
+			fmt.Printf("Received %d numbers sum: %d\n", counter, total)
+			stream.SendAndClose(&pb.NumResponse{Total: total})
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		total = total + next.X
+		counter++
+	}
+
+	return nil
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
 
-    pb.RegisterNumServiceServer(s, &NumServer{})
+	pb.RegisterNumServiceServer(s, &NumServer{})
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/streaming/example_03/chat.proto b/15_grpc/streaming/example_03/chat.proto
index 71dd464..0ebe1fe 100644
--- a/15_grpc/streaming/example_03/chat.proto
+++ b/15_grpc/streaming/example_03/chat.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package numbers;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_03/chat";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_03/chat";
 
 message ChatRequest {
     int64 id = 1;
diff --git a/15_grpc/streaming/example_03/client/client.go b/15_grpc/streaming/example_03/client/client.go
index e6ef3c8..c6c7946 100644
--- a/15_grpc/streaming/example_03/client/client.go
+++ b/15_grpc/streaming/example_03/client/client.go
@@ -1,63 +1,61 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_03/chat"
-    "google.golang.org/grpc"
-    "time"
-)
+	"context"
+	"fmt"
+	"time"
 
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_03/chat"
+	"google.golang.org/grpc"
+)
 
 func Chat(stream pb.ChatService_SendTxtClient, done chan bool) {
-    t := time.NewTicker(time.Millisecond*500)
-    for {
-        select {
-        case <- done:
-            return
-        case <- t.C:
-            err := stream.Send(&pb.ChatRequest{Txt:"Hello", Id:1, To:2})
-            if err != nil {
-                panic(err)
-            }
-        }
-    }
+	t := time.NewTicker(time.Millisecond * 500)
+	for {
+		select {
+		case <-done:
+			return
+		case <-t.C:
+			err := stream.Send(&pb.ChatRequest{Txt: "Hello", Id: 1, To: 2})
+			if err != nil {
+				panic(err)
+			}
+		}
+	}
 }
 
 func Stats(stream pb.ChatService_SendTxtClient, done chan bool) {
-    for {
-        stats, err := stream.Recv()
-        if err != nil {
-            panic(err)
-        }
-        fmt.Println(stats.String())
-        if stats.TotalChar > 35 {
-            fmt.Println("Beyond the limit!!!")
-            done <- true
-            stream.CloseSend()
-            return
-        }
-    }
+	for {
+		stats, err := stream.Recv()
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(stats.String())
+		if stats.TotalChar > 35 {
+			fmt.Println("Beyond the limit!!!")
+			done <- true
+			stream.CloseSend()
+			return
+		}
+	}
 }
 
-
 func main() {
-    conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
-    if err != nil {
-        panic(err)
-    }
-    defer conn.Close()
-
-    c := pb.NewChatServiceClient(conn)
-
-    stream, err := c.SendTxt(context.Background())
-    if err != nil {
-        panic(err)
-    }
-    done := make(chan bool)
-    go Stats(stream, done)
-    go Chat(stream, done)
-
-    <- done
+	conn, err := grpc.Dial(":50051", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+
+	c := pb.NewChatServiceClient(conn)
+
+	stream, err := c.SendTxt(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	done := make(chan bool)
+	go Stats(stream, done)
+	go Chat(stream, done)
+
+	<-done
 }
-
diff --git a/15_grpc/streaming/example_03/go.mod b/15_grpc/streaming/example_03/go.mod
index 2157c7b..ad3ef33 100644
--- a/15_grpc/streaming/example_03/go.mod
+++ b/15_grpc/streaming/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_03
 
 go 1.15
 
diff --git a/15_grpc/streaming/example_03/server/server.go b/15_grpc/streaming/example_03/server/server.go
index f4804f0..67f1523 100644
--- a/15_grpc/streaming/example_03/server/server.go
+++ b/15_grpc/streaming/example_03/server/server.go
@@ -1,55 +1,56 @@
 package main
 
 import (
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/streaming/example_03/chat"
-    "google.golang.org/grpc"
-    "io"
-    "net"
-    "time"
+	"fmt"
+	"io"
+	"net"
+	"time"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/streaming/example_03/chat"
+	"google.golang.org/grpc"
 )
 
-type ChatServer struct{
-    pb.UnimplementedChatServiceServer
+type ChatServer struct {
+	pb.UnimplementedChatServiceServer
 }
 
 func (c *ChatServer) SendTxt(stream pb.ChatService_SendTxtServer) error {
-    var total int64 = 0
-    go func(){
-       for {
-           t := time.NewTicker(time.Second*2)
-           select {
-           case <- t.C:
-               stream.Send(&pb.StatsResponse{TotalChar: total})
-           }
-       }
-    }()
-    for {
-       next, err := stream.Recv()
-       if err == io.EOF {
-           fmt.Println("Client closed")
-           return nil
-       }
-       if err != nil {
-           return err
-       }
-       fmt.Println("->", next.Txt)
-       total = total + int64(len(next.Txt))
-    }
-
-    return nil
+	var total int64 = 0
+	go func() {
+		for {
+			t := time.NewTicker(time.Second * 2)
+			select {
+			case <-t.C:
+				stream.Send(&pb.StatsResponse{TotalChar: total})
+			}
+		}
+	}()
+	for {
+		next, err := stream.Recv()
+		if err == io.EOF {
+			fmt.Println("Client closed")
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		fmt.Println("->", next.Txt)
+		total = total + int64(len(next.Txt))
+	}
+
+	return nil
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
 
-    pb.RegisterChatServiceServer(s, &ChatServer{})
+	pb.RegisterChatServiceServer(s, &ChatServer{})
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/testing/example_01/go.mod b/15_grpc/testing/example_01/go.mod
index 72befe1..3ebf9f4 100644
--- a/15_grpc/testing/example_01/go.mod
+++ b/15_grpc/testing/example_01/go.mod
@@ -1,8 +1,8 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpcurl/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpcurl/example_01
 
 go 1.15
 
-replace github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user => /Users/juan/nalej_workspace/src/github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user
+replace github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user => /Users/juan/nalej_workspace/src/github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user
 
 require (
     google.golang.org/grpc v1.35.0 // indirect
diff --git a/15_grpc/testing/example_01/server.go b/15_grpc/testing/example_01/server.go
index f9d00f0..9332d6e 100644
--- a/15_grpc/testing/example_01/server.go
+++ b/15_grpc/testing/example_01/server.go
@@ -1,34 +1,35 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/grpc/example_01/user"
-    "google.golang.org/grpc"
-    "google.golang.org/grpc/reflection"
-    "net"
+	"context"
+	"fmt"
+	"net"
+
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/grpc/example_01/user"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/reflection"
 )
 
-type UserServer struct{
-    pb.UnimplementedUserServiceServer
+type UserServer struct {
+	pb.UnimplementedUserServiceServer
 }
 
 func (u *UserServer) GetUser(ctx context.Context, req *pb.UserRequest) (*pb.User, error) {
-    fmt.Println("Server received:", req.String())
-    return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
+	fmt.Println("Server received:", req.String())
+	return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
 }
 
 func main() {
-    lis, err := net.Listen("tcp", "localhost:50051")
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
-    pb.RegisterUserServiceServer(s, &UserServer{})
+	lis, err := net.Listen("tcp", "localhost:50051")
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterUserServiceServer(s, &UserServer{})
 
-    reflection.Register(s)
+	reflection.Register(s)
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
diff --git a/15_grpc/transcoding/example_01/go.mod b/15_grpc/transcoding/example_01/go.mod
index cbff55d..cab499b 100644
--- a/15_grpc/transcoding/example_01/go.mod
+++ b/15_grpc/transcoding/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/transcoding/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/transcoding/example_01
 
 go 1.15
 
diff --git a/15_grpc/transcoding/example_01/server.go b/15_grpc/transcoding/example_01/server.go
index 8d107b3..c98eb1e 100644
--- a/15_grpc/transcoding/example_01/server.go
+++ b/15_grpc/transcoding/example_01/server.go
@@ -1,70 +1,70 @@
 package main
 
 import (
-    "context"
-    "fmt"
-    "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
-    pb "github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/transcoding/example_01/user"
-    "google.golang.org/grpc"
-    "net"
-    "net/http"
+	"context"
+	"fmt"
+	"net"
+	"net/http"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
+	pb "github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/transcoding/example_01/user"
+	"google.golang.org/grpc"
 )
 
-type UserServer struct{
-    httpAddr string
-    grpcAddr string
-    pb.UnimplementedUserServiceServer
+type UserServer struct {
+	httpAddr string
+	grpcAddr string
+	pb.UnimplementedUserServiceServer
 }
 
 func (u *UserServer) Get(ctx context.Context, req *pb.UserRequest) (*pb.User, error) {
-    fmt.Println("Server received:", req.String())
-    return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
+	fmt.Println("Server received:", req.String())
+	return &pb.User{UserId: "John", Email: "john@gmail.com"}, nil
 }
 
 func (u *UserServer) Create(ctx context.Context, req *pb.User) (*pb.User, error) {
-    fmt.Println("Server received:", req.String())
-    return &pb.User{UserId: req.UserId, Email: req.Email}, nil
+	fmt.Println("Server received:", req.String())
+	return &pb.User{UserId: req.UserId, Email: req.Email}, nil
 }
 
 func (u *UserServer) ServeGrpc() {
-    lis, err := net.Listen("tcp", u.grpcAddr)
-    if err != nil {
-        panic(err)
-    }
-    s := grpc.NewServer()
-    pb.RegisterUserServiceServer(s, u)
-    fmt.Println("Server listening GRCP:")
+	lis, err := net.Listen("tcp", u.grpcAddr)
+	if err != nil {
+		panic(err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterUserServiceServer(s, u)
+	fmt.Println("Server listening GRCP:")
 
-    if err := s.Serve(lis); err != nil {
-        panic(err)
-    }
+	if err := s.Serve(lis); err != nil {
+		panic(err)
+	}
 }
 
 func (u *UserServer) ServeHttp() {
-    mux := runtime.NewServeMux()
-    opts := []grpc.DialOption{grpc.WithInsecure()}
-    endpoint := u.grpcAddr
+	mux := runtime.NewServeMux()
+	opts := []grpc.DialOption{grpc.WithInsecure()}
+	endpoint := u.grpcAddr
 
-    err := pb.RegisterUserServiceHandlerFromEndpoint(context.Background(), mux, endpoint, opts)
-    if err != nil {
-        panic(err)
-    }
+	err := pb.RegisterUserServiceHandlerFromEndpoint(context.Background(), mux, endpoint, opts)
+	if err != nil {
+		panic(err)
+	}
 
-    httpServer := &http.Server{
-        Addr: u.httpAddr,
-        Handler: mux,
-    }
+	httpServer := &http.Server{
+		Addr:    u.httpAddr,
+		Handler: mux,
+	}
 
-    fmt.Println("Server listing HTTP:")
-    if err = httpServer.ListenAndServe(); err!=nil{
-        panic(err)
-    }
+	fmt.Println("Server listing HTTP:")
+	if err = httpServer.ListenAndServe(); err != nil {
+		panic(err)
+	}
 }
 
-
 func main() {
 
-    us := UserServer{httpAddr:":8080",grpcAddr:":50051"}
-    go us.ServeGrpc()
-    us.ServeHttp()
+	us := UserServer{httpAddr: ":8080", grpcAddr: ":50051"}
+	go us.ServeGrpc()
+	us.ServeHttp()
 }
diff --git a/15_grpc/transcoding/example_01/user.proto b/15_grpc/transcoding/example_01/user.proto
index 15126f2..dd842b3 100644
--- a/15_grpc/transcoding/example_01/user.proto
+++ b/15_grpc/transcoding/example_01/user.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
 package user;
 
-option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/13_grpc/transcoding/example_01/user";
+option go_package="github.com/juanmanuel-tirado/savetheworldwithgo/15_grpc/transcoding/example_01/user";
 
 import "google/api/annotations.proto";
 
diff --git a/16_logger/zerolog/advanced/example_01/go.mod b/16_logger/zerolog/advanced/example_01/go.mod
index 95d9252..114ea32 100644
--- a/16_logger/zerolog/advanced/example_01/go.mod
+++ b/16_logger/zerolog/advanced/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/advanced/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/advanced/example_01
 
 go 1.15
 
diff --git a/16_logger/zerolog/advanced/example_02/go.mod b/16_logger/zerolog/advanced/example_02/go.mod
index a222a94..6d5467e 100644
--- a/16_logger/zerolog/advanced/example_02/go.mod
+++ b/16_logger/zerolog/advanced/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/advanced/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/advanced/example_02
 
 go 1.15
 
diff --git a/16_logger/zerolog/advanced/example_03/go.mod b/16_logger/zerolog/advanced/example_03/go.mod
index 0cd9728..142d7bf 100644
--- a/16_logger/zerolog/advanced/example_03/go.mod
+++ b/16_logger/zerolog/advanced/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/advanced/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/advanced/example_03
 
 go 1.15
 
diff --git a/16_logger/zerolog/advanced/example_04/go.mod b/16_logger/zerolog/advanced/example_04/go.mod
index f3f2497..f5969b6 100644
--- a/16_logger/zerolog/advanced/example_04/go.mod
+++ b/16_logger/zerolog/advanced/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/advanced/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/advanced/example_04
 
 go 1.15
 
diff --git a/16_logger/zerolog/advanced/example_05/go.mod b/16_logger/zerolog/advanced/example_05/go.mod
index 0d686fb..56787c7 100644
--- a/16_logger/zerolog/advanced/example_05/go.mod
+++ b/16_logger/zerolog/advanced/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/advanced/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/advanced/example_05
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_01/go.mod b/16_logger/zerolog/basics/example_01/go.mod
index ac9d557..e9a93bb 100644
--- a/16_logger/zerolog/basics/example_01/go.mod
+++ b/16_logger/zerolog/basics/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/example_01
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_02/go.mod b/16_logger/zerolog/basics/example_02/go.mod
index 6243ce6..de4bf49 100644
--- a/16_logger/zerolog/basics/example_02/go.mod
+++ b/16_logger/zerolog/basics/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/example_02
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_03/go.mod b/16_logger/zerolog/basics/example_03/go.mod
index 4f7f01b..849646d 100644
--- a/16_logger/zerolog/basics/example_03/go.mod
+++ b/16_logger/zerolog/basics/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/example_03
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_04/go.mod b/16_logger/zerolog/basics/example_04/go.mod
index 37466b9..3a59f21 100644
--- a/16_logger/zerolog/basics/example_04/go.mod
+++ b/16_logger/zerolog/basics/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/example_04
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_05/go.mod b/16_logger/zerolog/basics/example_05/go.mod
index 256c81d..9151a97 100644
--- a/16_logger/zerolog/basics/example_05/go.mod
+++ b/16_logger/zerolog/basics/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/basics/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/basics/example_05
 
 go 1.15
 
diff --git a/16_logger/zerolog/basics/example_06/go.mod b/16_logger/zerolog/basics/example_06/go.mod
index 58791f0..eb47f89 100644
--- a/16_logger/zerolog/basics/example_06/go.mod
+++ b/16_logger/zerolog/basics/example_06/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/basics/example_06
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/basics/example_06
 
 go 1.15
 
diff --git a/16_logger/zerolog/settings/example_01/go.mod b/16_logger/zerolog/settings/example_01/go.mod
index c8eb863..a13b2d8 100644
--- a/16_logger/zerolog/settings/example_01/go.mod
+++ b/16_logger/zerolog/settings/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/settings/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/settings/example_01
 
 go 1.15
 
diff --git a/16_logger/zerolog/settings/example_02/go.mod b/16_logger/zerolog/settings/example_02/go.mod
index fb2682a..b5d09ab 100644
--- a/16_logger/zerolog/settings/example_02/go.mod
+++ b/16_logger/zerolog/settings/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/settings/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/settings/example_02
 
 go 1.15
 
diff --git a/16_logger/zerolog/settings/example_03/go.mod b/16_logger/zerolog/settings/example_03/go.mod
index 70fa8ba..b04d1fe 100644
--- a/16_logger/zerolog/settings/example_03/go.mod
+++ b/16_logger/zerolog/settings/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/settings/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/settings/example_03
 
 go 1.15
 
diff --git a/16_logger/zerolog/settings/example_04/go.mod b/16_logger/zerolog/settings/example_04/go.mod
index 045956c..27bf6b1 100644
--- a/16_logger/zerolog/settings/example_04/go.mod
+++ b/16_logger/zerolog/settings/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/14_logger/zerolog/settings/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/16_logger/zerolog/settings/example_04
 
 go 1.15
 
diff --git a/17_cli/cobra/advanced/example_01/go.mod b/17_cli/cobra/advanced/example_01/go.mod
index c2295c6..da7e540 100644
--- a/17_cli/cobra/advanced/example_01/go.mod
+++ b/17_cli/cobra/advanced/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_01
 
 go 1.15
 
diff --git a/17_cli/cobra/advanced/example_02/go.mod b/17_cli/cobra/advanced/example_02/go.mod
index 9f0b712..c3364e2 100644
--- a/17_cli/cobra/advanced/example_02/go.mod
+++ b/17_cli/cobra/advanced/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_02
 
 go 1.15
 
diff --git a/17_cli/cobra/advanced/example_03/go.mod b/17_cli/cobra/advanced/example_03/go.mod
index 6cb92f1..4873dea 100644
--- a/17_cli/cobra/advanced/example_03/go.mod
+++ b/17_cli/cobra/advanced/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_03
 
 go 1.15
 
diff --git a/17_cli/cobra/advanced/example_03/main.go b/17_cli/cobra/advanced/example_03/main.go
index 974dff4..09dadc8 100644
--- a/17_cli/cobra/advanced/example_03/main.go
+++ b/17_cli/cobra/advanced/example_03/main.go
@@ -15,7 +15,7 @@ limitations under the License.
 */
 package main
 
-import "github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_03/cmd"
+import "github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_03/cmd"
 
 func main() {
 	cmd.Execute()
diff --git a/17_cli/cobra/advanced/example_04/go.mod b/17_cli/cobra/advanced/example_04/go.mod
index a6c909c..b48a548 100644
--- a/17_cli/cobra/advanced/example_04/go.mod
+++ b/17_cli/cobra/advanced/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_04
 
 go 1.15
 
diff --git a/17_cli/cobra/advanced/example_05/db.go b/17_cli/cobra/advanced/example_05/db.go
index fe70233..7616d19 100644
--- a/17_cli/cobra/advanced/example_05/db.go
+++ b/17_cli/cobra/advanced/example_05/db.go
@@ -2,31 +2,32 @@ package main
 
 import (
 	"fmt"
-	"github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_05/cmd"
-	"github.com/spf13/cobra"
-	"os"
 	"math/rand"
+	"os"
 	"time"
+
+	"github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_05/cmd"
+	"github.com/spf13/cobra"
 )
 
 var RootCmd = &cobra.Command{
-	Use: "db",
+	Use:  "db",
 	Long: "Root command",
 }
 
 var GetCmd = &cobra.Command{
-	Use: "get",
+	Use:   "get",
 	Short: "Get user data",
-	Args: cobra.ExactValidArgs(1),
+	Args:  cobra.ExactValidArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Printf("Get user %s!!!\n",args[0])
+		fmt.Printf("Get user %s!!!\n", args[0])
 	},
 	ValidArgsFunction: UserGet,
 }
 
-func UserGet (cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+func UserGet(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 	rand.Seed(time.Now().UnixNano())
-	if rand.Int() % 2 == 0 {
+	if rand.Int()%2 == 0 {
 		return []string{"John", "Mary"}, cobra.ShellCompDirectiveNoFileComp
 	}
 	return []string{"Ernest", "Rick", "Mary"}, cobra.ShellCompDirectiveNoFileComp
diff --git a/17_cli/cobra/advanced/example_05/go.mod b/17_cli/cobra/advanced/example_05/go.mod
index bde7623..302f6b8 100644
--- a/17_cli/cobra/advanced/example_05/go.mod
+++ b/17_cli/cobra/advanced/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/advanced/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/advanced/example_05
 
 go 1.15
 
diff --git a/17_cli/cobra/basics/example_01/go.mod b/17_cli/cobra/basics/example_01/go.mod
index 5273ee6..a82c7df 100644
--- a/17_cli/cobra/basics/example_01/go.mod
+++ b/17_cli/cobra/basics/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/basics/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/basics/example_01
 
 go 1.15
 
diff --git a/17_cli/cobra/commands/example_01/go.mod b/17_cli/cobra/commands/example_01/go.mod
index 3960fa0..1a60253 100644
--- a/17_cli/cobra/commands/example_01/go.mod
+++ b/17_cli/cobra/commands/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/example_01
 
 go 1.15
 
diff --git a/17_cli/cobra/commands/example_02/go.mod b/17_cli/cobra/commands/example_02/go.mod
index 983f393..b5b7c49 100644
--- a/17_cli/cobra/commands/example_02/go.mod
+++ b/17_cli/cobra/commands/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/commands/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/commands/example_02
 
 go 1.15
 
diff --git a/17_cli/cobra/commands/example_03/go.mod b/17_cli/cobra/commands/example_03/go.mod
index 3d81c80..a086a92 100644
--- a/17_cli/cobra/commands/example_03/go.mod
+++ b/17_cli/cobra/commands/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/commands/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/commands/example_03
 
 go 1.15
 
diff --git a/17_cli/cobra/flags/example_01/go.mod b/17_cli/cobra/flags/example_01/go.mod
index 87d9e7b..53c28d0 100644
--- a/17_cli/cobra/flags/example_01/go.mod
+++ b/17_cli/cobra/flags/example_01/go.mod
@@ -1,3 +1,3 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/flags/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/flags/example_01
 
 go 1.15
diff --git a/17_cli/cobra/flags/example_02/go.mod b/17_cli/cobra/flags/example_02/go.mod
index 62ac0a9..62cc3f9 100644
--- a/17_cli/cobra/flags/example_02/go.mod
+++ b/17_cli/cobra/flags/example_02/go.mod
@@ -1,3 +1,3 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/flags/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/flags/example_02
 
 go 1.15
diff --git a/17_cli/cobra/flags/example_03/go.mod b/17_cli/cobra/flags/example_03/go.mod
index 42cf064..b2686c0 100644
--- a/17_cli/cobra/flags/example_03/go.mod
+++ b/17_cli/cobra/flags/example_03/go.mod
@@ -1,3 +1,3 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/flags/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/flags/example_03
 
 go 1.15
diff --git a/17_cli/cobra/flags/example_04/go.mod b/17_cli/cobra/flags/example_04/go.mod
index 3960fa0..1a60253 100644
--- a/17_cli/cobra/flags/example_04/go.mod
+++ b/17_cli/cobra/flags/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/example_01
 
 go 1.15
 
diff --git a/17_cli/cobra/flags/example_05/go.mod b/17_cli/cobra/flags/example_05/go.mod
index 3960fa0..1a60253 100644
--- a/17_cli/cobra/flags/example_05/go.mod
+++ b/17_cli/cobra/flags/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/15_cli/cobra/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/17_cli/cobra/example_01
 
 go 1.15
 
diff --git a/18_sql/gorm/example_01/go.mod b/18_sql/gorm/example_01/go.mod
index 601718f..fc190f5 100644
--- a/18_sql/gorm/example_01/go.mod
+++ b/18_sql/gorm/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_01
 
 go 1.15
 
diff --git a/18_sql/gorm/manipulate/example_01/go.mod b/18_sql/gorm/manipulate/example_01/go.mod
index 0b9d439..fa84791 100644
--- a/18_sql/gorm/manipulate/example_01/go.mod
+++ b/18_sql/gorm/manipulate/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/manipulate/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/manipulate/example_01
 
 go 1.15
 
diff --git a/18_sql/gorm/manipulate/example_02/go.mod b/18_sql/gorm/manipulate/example_02/go.mod
index cbf213e..c90a7d2 100644
--- a/18_sql/gorm/manipulate/example_02/go.mod
+++ b/18_sql/gorm/manipulate/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/manipulate/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/manipulate/example_02
 
 go 1.15
 
diff --git a/18_sql/gorm/manipulate/example_03/go.mod b/18_sql/gorm/manipulate/example_03/go.mod
index ffc01db..d4f6f9d 100644
--- a/18_sql/gorm/manipulate/example_03/go.mod
+++ b/18_sql/gorm/manipulate/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/manipulate/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/manipulate/example_03
 
 go 1.15
 
diff --git a/18_sql/gorm/manipulate/example_04/go.mod b/18_sql/gorm/manipulate/example_04/go.mod
index 2a20dff..60c088c 100644
--- a/18_sql/gorm/manipulate/example_04/go.mod
+++ b/18_sql/gorm/manipulate/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/manipulate/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/manipulate/example_04
 
 go 1.15
 
diff --git a/18_sql/gorm/modelling/example_01/go.mod b/18_sql/gorm/modelling/example_01/go.mod
index 844efd1..ecd33d8 100644
--- a/18_sql/gorm/modelling/example_01/go.mod
+++ b/18_sql/gorm/modelling/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_02
 
 go 1.15
 
diff --git a/18_sql/gorm/modelling/example_02/go.mod b/18_sql/gorm/modelling/example_02/go.mod
index bedba90..ff60c8d 100644
--- a/18_sql/gorm/modelling/example_02/go.mod
+++ b/18_sql/gorm/modelling/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_03
 
 go 1.15
 
diff --git a/18_sql/gorm/modelling/example_03/go.mod b/18_sql/gorm/modelling/example_03/go.mod
index 6c2b7cd..b984a16 100644
--- a/18_sql/gorm/modelling/example_03/go.mod
+++ b/18_sql/gorm/modelling/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_04
 
 go 1.15
 
diff --git a/18_sql/gorm/modelling/example_04/go.mod b/18_sql/gorm/modelling/example_04/go.mod
index b9c1e7f..4c0e102 100644
--- a/18_sql/gorm/modelling/example_04/go.mod
+++ b/18_sql/gorm/modelling/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_05
 
 go 1.15
 
diff --git a/18_sql/gorm/modelling/example_05/go.mod b/18_sql/gorm/modelling/example_05/go.mod
index fef9ff7..479e725 100644
--- a/18_sql/gorm/modelling/example_05/go.mod
+++ b/18_sql/gorm/modelling/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/example_06
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/example_06
 
 go 1.15
 
diff --git a/18_sql/gorm/transactions/example_01/go.mod b/18_sql/gorm/transactions/example_01/go.mod
index a2682d2..c8a093d 100644
--- a/18_sql/gorm/transactions/example_01/go.mod
+++ b/18_sql/gorm/transactions/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/transactions/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/transactions/example_01
 
 go 1.15
 
diff --git a/18_sql/gorm/transactions/example_02/go.mod b/18_sql/gorm/transactions/example_02/go.mod
index 4744c01..783965f 100644
--- a/18_sql/gorm/transactions/example_02/go.mod
+++ b/18_sql/gorm/transactions/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/gorm/transactions/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/gorm/transactions/example_02
 
 go 1.15
 
diff --git a/18_sql/sql/example_01/go.mod b/18_sql/sql/example_01/go.mod
index 0533068..362ad58 100644
--- a/18_sql/sql/example_01/go.mod
+++ b/18_sql/sql/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/example_01
 
 go 1.15
 
diff --git a/18_sql/sql/example_02/go.mod b/18_sql/sql/example_02/go.mod
index c02954c..e43570c 100644
--- a/18_sql/sql/example_02/go.mod
+++ b/18_sql/sql/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/example_02
 
 go 1.15
 
diff --git a/18_sql/sql/example_03/go.mod b/18_sql/sql/example_03/go.mod
index aaeb167..da394a1 100644
--- a/18_sql/sql/example_03/go.mod
+++ b/18_sql/sql/example_03/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/example_03
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/example_03
 
 go 1.15
 
diff --git a/18_sql/sql/example_04/go.mod b/18_sql/sql/example_04/go.mod
index 06ceb1c..cc9e1c3 100644
--- a/18_sql/sql/example_04/go.mod
+++ b/18_sql/sql/example_04/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/example_04
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/example_04
 
 go 1.15
 
diff --git a/18_sql/sql/example_05/go.mod b/18_sql/sql/example_05/go.mod
index 128356d..34f7e33 100644
--- a/18_sql/sql/example_05/go.mod
+++ b/18_sql/sql/example_05/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/16_sql/sql/example_05
+module github.com/juanmanuel-tirado/savetheworldwithgo/18_sql/sql/example_05
 
 go 1.15
 
diff --git a/19_nosql/gocql/connection/example_01/go.mod b/19_nosql/gocql/connection/example_01/go.mod
index 7f2b929..beb2c18 100644
--- a/19_nosql/gocql/connection/example_01/go.mod
+++ b/19_nosql/gocql/connection/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/example_01
 
 go 1.15
 
diff --git a/19_nosql/gocql/manipulate/example_01/go.mod b/19_nosql/gocql/manipulate/example_01/go.mod
index 63dba22..805553f 100644
--- a/19_nosql/gocql/manipulate/example_01/go.mod
+++ b/19_nosql/gocql/manipulate/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/manipulate/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/manipulate/example_01
 
 go 1.15
 
diff --git a/19_nosql/gocql/manipulate/example_02/go.mod b/19_nosql/gocql/manipulate/example_02/go.mod
index 48687d7..366e2f7 100644
--- a/19_nosql/gocql/manipulate/example_02/go.mod
+++ b/19_nosql/gocql/manipulate/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/manipulate/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/manipulate/example_02
 
 go 1.15
 
diff --git a/19_nosql/gocql/queries/example_01/go.mod b/19_nosql/gocql/queries/example_01/go.mod
index 01fe4a5..b78ffcd 100644
--- a/19_nosql/gocql/queries/example_01/go.mod
+++ b/19_nosql/gocql/queries/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/queries/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/queries/example_01
 
 go 1.15
 
diff --git a/19_nosql/gocql/queries/example_02/go.mod b/19_nosql/gocql/queries/example_02/go.mod
index 4bcfe2e..bf6ce98 100644
--- a/19_nosql/gocql/queries/example_02/go.mod
+++ b/19_nosql/gocql/queries/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/queries/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/queries/example_02
 
 go 1.15
 
diff --git a/19_nosql/gocql/udts/example_01/go.mod b/19_nosql/gocql/udts/example_01/go.mod
index 7af257e..8d0f78e 100644
--- a/19_nosql/gocql/udts/example_01/go.mod
+++ b/19_nosql/gocql/udts/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/17_nosql/gocql/udts/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/19_nosql/gocql/udts/example_01
 
 go 1.15
 
diff --git a/20_kafka/confluent/example_01/go.mod b/20_kafka/confluent/example_01/go.mod
index 42e072f..f3176dd 100644
--- a/20_kafka/confluent/example_01/go.mod
+++ b/20_kafka/confluent/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/18_kafka/confluent/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/20_kafka/confluent/example_01
 
 go 1.15
 
diff --git a/20_kafka/confluent/example_02/go.mod b/20_kafka/confluent/example_02/go.mod
index 1e933e2..25ce444 100644
--- a/20_kafka/confluent/example_02/go.mod
+++ b/20_kafka/confluent/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/18_kafka/confluent/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/20_kafka/confluent/example_02
 
 go 1.15
 
diff --git a/20_kafka/rest/example_01/go.mod b/20_kafka/rest/example_01/go.mod
index 977c0ee..99d79d5 100644
--- a/20_kafka/rest/example_01/go.mod
+++ b/20_kafka/rest/example_01/go.mod
@@ -1,3 +1,3 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/18_kafka/rest/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/20_kafka/rest/example_01
 
 go 1.15
diff --git a/20_kafka/segmentio/example_01/go.mod b/20_kafka/segmentio/example_01/go.mod
index c66f500..b901386 100644
--- a/20_kafka/segmentio/example_01/go.mod
+++ b/20_kafka/segmentio/example_01/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/18_kafka/kafka-go/example_01
+module github.com/juanmanuel-tirado/savetheworldwithgo/20_kafka/kafka-go/example_01
 
 go 1.15
 
diff --git a/20_kafka/segmentio/example_02/go.mod b/20_kafka/segmentio/example_02/go.mod
index fe2aeda..3ce0788 100644
--- a/20_kafka/segmentio/example_02/go.mod
+++ b/20_kafka/segmentio/example_02/go.mod
@@ -1,4 +1,4 @@
-module github.com/juanmanuel-tirado/savetheworldwithgo/18_kafka/kafka-go/example_02
+module github.com/juanmanuel-tirado/savetheworldwithgo/20_kafka/kafka-go/example_02
 
 go 1.15