public async Task <IActionResult> Index(Guid id)
        {
            if (id == Guid.Empty)
            {
                return(RedirectToAction("Index"));
            }
            ViewModel vm = new ViewModel
            {
                TodoList = await _todoListAppService.GetAllTodoListsAsync(),
                Todos    = await _todoAppService.GetAllTodosByTodoListIdAsync(id)
            };

            return(View(vm));
        }