public IHttpActionResult AddStars(int id, int NumOfStars, int RateByUser)
        {
            ErrorMessage errorMessage = usersBL.AddStars(id, NumOfStars, RateByUser);

            if (errorMessage.Code == HttpStatusCode.OK)
            {
                User updatedUser = usersBL.GetUser(id);
                return(Ok(updatedUser));
            }

            return(new ResponseMessageResult(Request.CreateErrorResponse(
                                                 errorMessage.Code,
                                                 new HttpError(errorMessage.Message)
                                                 )
                                             ));
        }