public IHttpActionResult Post([FromBody] trackUser trackUser)
        {
            try
            {
                if (trackUser == null)
                {
                    return(BadRequest());
                }


                var result = _repository.Insert(trackUser);
                if (result.Status == RepositoryActionStatus.Created)
                {
                    // map to dto
                    return(Created <trackUser>(Request.RequestUri
                                               + "/" + trackUser.Id.ToString(), trackUser));
                }

                return(BadRequest());
            }
            catch (Exception)
            {
                return(InternalServerError());
            }
        }