public UserPasswordChangedReturnDto ChangePassword(int userId, UpdatePasswordDto passWords) { if (_userOperations.UserExists(userId)) { return(null); } var user = _userOperations.GetUserById(userId); if (passWords.OldPassword == passWords.NewPassword) { return(null); } var changedUser = _userOperations.ChangePassword(user, passWords.OldPassword, passWords.NewPassword); return(changedUser == null ? null : Mapper.Map <UserPasswordChangedReturnDto>(changedUser)); }