public ActionResult <Follow> Create(Follow follow)
        {
            try
            {
                _service.Create(follow);
                _service.SaveChanges();

                return(CreatedAtRoute(nameof(GetFollowById), new { Id = follow.FollowId }, follow));
            }
            catch (AppException ex)
            {
                // return error message if there was an exception
                return(BadRequest(new { message = ex.Message }));
            }
        }