public IHttpActionResult TryLogin(UserDTO user_info)
        {
            ResponseMessage response = new ResponseMessage();
            UserDTO         user     = _service.TryLoginUser(user_info.username, user_info.password);

            if (user != null)
            {
                response.Code = 200;
                response.Body = "User credentials are correct.";
                return(Json(response));
            }
            else
            {
                response.Code = 403;
                response.Body = "Username or password are incorrect!";
                return(Json(response));
            }
        }
        public UserDTO TryLogin(string username, string password)
        {
            UserDTO u = usersService.TryLoginUser(username, password);

            return(u);
        }