// POST odata/TodoLists
        public IHttpActionResult Post(TodoList todoList)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            todoList.UserId = User.Identity.Name;
            db.TodoLists.Add(todoList);
            db.SaveChanges();

            return Created(todoList);
        }
        // PUT odata/TodoLists(5)
        public IHttpActionResult Put([FromODataUri] int key, TodoList todoList)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (key != todoList.TodoListId || todoList.UserId != User.Identity.Name)
            {
                return BadRequest();
            }

            if (!GetTodoListQuery(key).Any())
            {
                return NotFound();
            }

            db.Entry(todoList).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!TodoListExists(key))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return Updated(todoList);
        }