public async Task <IActionResult> Add([FromRoute] string userId, [FromBody] AddUserAttributeModel addUserAttribute)
        {
            Result result = await _userAttributeService.Add(userId, addUserAttribute);

            if (result.Failure)
            {
                ModelState.AddErrors(result);
                return(BadRequest(ModelState));
            }

            return(Ok(new EmptyResult()));
        }