public ActionResult <IListMgrItem> AddListMgrItem(ListMgrItem listMgrItem)
        {
            var result = _repository.AddListMgrItem(listMgrItem);

            if (result is ListMgrItem)
            {
                return((ListMgrItem)result);
            }

            return(BadRequest());
        }
        public IActionResult UpdateListMgrItem(int listMgrID, ListMgrItem listMgrItem)
        {
            if (listMgrID != listMgrItem.ListMgrID)
            {
                return(BadRequest());
            }

            try {
                _repository.UpdateListMgrItem(listMgrItem);
            } catch (NotFoundException) {
                return(NotFound());
            }

            return(Ok());
        }