add: mockSMTP Server for testing; getUser func

internal/repositories/user_repository.go

@@ -17,6 +17,7 @@ import (
 type UserRepositoryInterface interface {
 	CreateUser(user *models.User) (int64, error)
 	UpdateUser(userID int64, user *models.User) error
+	GetUsers(where map[string]interface{}) (*[]models.User, error)
 	FindUserByID(id int64) (*models.User, error)
 	FindUserByEmail(email string) (*models.User, error)
 	SetVerificationToken(user *models.User, token *string) (int64, error)
@@ -51,6 +52,24 @@ func (ur *UserRepository) UpdateUser(userID int64, user *models.User) error {
 	return nil
 }
 
+func (ur *UserRepository) GetUsers(where map[string]interface{}) (*[]models.User, error) {
+	var users []models.User
+	result := database.DB.
+		Preload("Consents").
+		Preload("BankAccount").
+		Preload("Verification").
+		Preload("Membership", func(db *gorm.DB) *gorm.DB {
+			return db.Preload("SubscriptionModel")
+		}).Where(where).Find(&users)
+	if result.Error != nil {
+		if result.Error == gorm.ErrRecordNotFound {
+			return nil, gorm.ErrRecordNotFound
+		}
+		return nil, result.Error
+	}
+	return &users, nil
+}
+
 func (ur *UserRepository) FindUserByID(id int64) (*models.User, error) {
 	var user models.User
 	result := database.DB.