public async Task <IActionResult> Get(string userId)
        {
            var exception = new Exception();

            try
            {
                IUserActors actor = GetActor(userId);

                Dictionary <Guid, int> products = await actor.GetCart();

                return(Ok(new CartDetails()
                {
                    UserId = userId,
                    Items = products.Select(
                        p => new CartItem {
                        ProductId = p.Key.ToString(), Quantity = p.Value
                    }).ToArray()
                }));
            }
            catch (Exception ex)
            {
                exception = ex;
            }
            return(BadRequest(exception));
        }
        public async Task <IActionResult> Add(string userId, [FromBody] AddCartItem request)
        {
            var exception = new Exception();

            try
            {
                IUserActors actor = GetActor(userId);
                await actor.AddToCart(request.ProductId, request.Quantity);

                return(Accepted());
            }
            catch (Exception ex)
            {
                exception = ex;
            }
            return(BadRequest(exception));
        }