public async Task <ActionResult> AddAccessoryFromCart(int id, string url)
        {
            GetShoppingCart();
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(baseurl);
                client.DefaultRequestHeaders.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                HttpResponseMessage res = await client.GetAsync($"Accessories/{id}");

                if (res.IsSuccessStatusCode)
                {
                    var         response    = res.Content.ReadAsStringAsync().Result;
                    Accessories accessories = JsonConvert.DeserializeObject <Accessories>(response);
                    cart.AddAccessories(accessories);
                    HttpContext.Session.SetString("Cart", JsonConvert.SerializeObject(cart));
                    return(Redirect(url));
                }
            }
            TempData["Message"] = "Error has occured.";
            return(Redirect(url));
        }