diff --git a/src/main/java/mate/academy/Main.java b/src/main/java/mate/academy/Main.java
index 9c1dcdecf..d2d36b0d1 100644
--- a/src/main/java/mate/academy/Main.java
+++ b/src/main/java/mate/academy/Main.java
@@ -2,7 +2,7 @@
 
 import mate.academy.service.AuthenticationService;
 
-public class Main {
+class Main {
     private static final AuthenticationService authenticationService = new AuthenticationService();
 
     public static void main(String[] args) {
diff --git a/src/main/java/mate/academy/service/AuthenticationService.java b/src/main/java/mate/academy/service/AuthenticationService.java
index 8f7c7c975..83cdc9e11 100644
--- a/src/main/java/mate/academy/service/AuthenticationService.java
+++ b/src/main/java/mate/academy/service/AuthenticationService.java
@@ -1,6 +1,9 @@
 package mate.academy.service;
 
+import mate.academy.model.User;
+
 public class AuthenticationService {
+    private UserService userService = new UserService();
     /**
      * Imagine that some user wants to login to your site.
      * You should check if user credentials (login and password) are valid or not.
@@ -10,7 +13,9 @@ public class AuthenticationService {
      * @return true if user by email exists and passed password is equal to user's password.
      * Return false in any other cases.
      */
+
     public boolean login(String email, String password) {
-        return false;
+        User foundUser = userService.findByEmail(email);
+        return foundUser != null && foundUser.getPassword().equals(password);
     }
 }
diff --git a/src/main/java/mate/academy/service/UserService.java b/src/main/java/mate/academy/service/UserService.java
index 1652d7d68..fbae08c5b 100644
--- a/src/main/java/mate/academy/service/UserService.java
+++ b/src/main/java/mate/academy/service/UserService.java
@@ -7,6 +7,8 @@ public class UserService {
             new User("bob@i.ua", "1234"),
             new User("alice@i.ua", "1234")
     };
+    private int age;
+    private String naming;
 
     /**
      * Find user by email. All users are stored in <code>private static final User[] users</code>
@@ -14,7 +16,13 @@ public class UserService {
      * @return - user if his email is equal to passed email.
      * Return <code>null</code> if there is no suitable user
      */
+
     public User findByEmail(String email) {
+        for (User currentUser : users) {
+            if (currentUser.getEmail().equals(email)) {
+                return currentUser;
+            }
+        }
         return null;
     }
 }