public HttpResponseMessage GetUsers()
 {
     return SafeAction(() =>
       {
       IDelightServices service = new DelightServices();
       var users = service.GetUsers();
       if (users == null)
       {
           return Request.CreateResponse(HttpStatusCode.NoContent);
       }
       var response = Request.CreateResponse<IEnumerable<UserDTO>>(HttpStatusCode.OK, users);
       return response;
       });
 }