public async Task <IActionResult> Add([FromBody] ObjectiveModel model)
        {
            try
            {
                var response = await _service.Add(model);

                if (!response.IsSuccessful)
                {
                    return(BadRequest(response));
                }
                return(Ok(response));
            }
            catch
            {
                return(StatusCode(500, "Internal Server Error."));
            }
        }