Feature: add header api key to datasource config

config/credentials.go

@@ -2,11 +2,17 @@ package config
 
 // Credentials -
 type Credentials struct {
-	User *UserCredentials `yaml:"user,omitempty" validate:"omitempty"`
+	User   *UserCredentials `yaml:"user,omitempty"    validate:"omitempty"`
+	ApiKey *ApiKey          `yaml:"api_key,omitempty" validate:"omitempty"`
 }
 
 // UserCredentials -
 type UserCredentials struct {
 	Name     string `yaml:"name" validate:"required"`
 	Password string `yaml:"password" validate:"required"`
 }
+
+type ApiKey struct {
+	Header string `yaml:"header" validate:"required"`
+	Key    string `yaml:"key"    validate:"required"`
+}