public async Task <IActionResult> AddCartItemAsync([FromRoute] long userID, [FromBody] XAddCartItemRequest request)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest());
            }

            if (!await mCartService.AddCartItemAsync(userID, request.ProductID.Value))
            {
                return(NotFound());
            }

            return(Ok());
        }
 public async Task <bool> AddCartItemAsync(long userID, XAddCartItemRequest request)
 {
     return(await mCartService.AddCartItemAsync(userID, request.ProductID.Value));
 }