public IActionResult CreateTodo([DataSourceRequest] DataSourceRequest request,
                                        UserTodoItemViewModel model)
        {
            if (model != null && ModelState.IsValid)
            {
                model = todoManager.Create(model);
            }

            return(Json(new[] { model }.ToDataSourceResult(request, ModelState)));
        }
        public IActionResult DeleteTodo([DataSourceRequest] DataSourceRequest request, UserTodoItemViewModel model, string userId)
        {
            todoManager.Delete(model);

            return(Json(new[] { model }.ToDataSourceResult(request, ModelState)));
        }