complete group creation endpoint with auth and validation, change parameter and return pointer usage in some get func

database.go

@@ -86,25 +86,25 @@ func isPassValid(ctx context.Context, id uint32, plainPassword string) bool {
 	return bcrypt.CompareHashAndPassword([]byte(controlHash), []byte(plainPassword)) == nil
 }
 
-func GetUserDataById(ctx context.Context, id uint32) (*User, error) {
+func GetUserDataById(ctx context.Context, id uint32) (User, error) {
 	var user User
 	err := dbConnection.QueryRow(ctx, "SELECT id, name, pass_hash, color FROM users WHERE id = $1", id).
 		Scan(&user.Id, &user.Name, &user.Password, &user.Color)
 	if err != nil {
-		return &User{}, err
+		return User{}, err
 	}
 	user.IsPasswordHashed = true
-	return &user, nil
+	return user, nil
 }
-func GetUserDataByName(ctx context.Context, name string) (*User, error) {
+func GetUserDataByName(ctx context.Context, name string) (User, error) {
 	var user User
 	err := dbConnection.QueryRow(ctx, "SELECT id, name, pass_hash, color FROM users WHERE name = $1", name).
 		Scan(&user.Id, &user.Name, &user.Password, &user.Color)
 	if err != nil {
-		return &User{}, err
+		return User{}, err
 	}
 	user.IsPasswordHashed = true
-	return &user, nil
+	return user, nil
 }
 
 func CreateChatGroupWithoutMembers(ctx context.Context, group *ChatGroup) (uint32, error) {