public IActionResult Index(TestModel model)
        {
            //var product = new Product
            //{
            //    Name = "Product 1"
            //};

            //var response = _service.CreateProduct(product);
            //product.Id = response.id;
            //_db.Product.Add(product);
            //_db.SaveChanges();

            //var price = new Price
            //{
            //    Amount = 50,
            //    ProductId = "prod_IFBXVCJcTIUnsk",
            //    Currency = "usd",
            //    Nickname = "Primary"
            //};

            //var response = _service.CreatePrice(price);
            //price.Id = response.id;
            //_db.Prices.Add(price);
            //_db.SaveChanges();
            var response = _service.CreateInvoiceItem("cus_IEuw9XTVoO0eMW", "price_1HehEOIarr7Ydt676Dac6RCP", 1);

            //var response = _service.CreateInvoice("cus_IEuw9XTVoO0eMW");
            //var amount = _service.GetCustomerBalance("cus_IEuw9XTVoO0eMW");


            return(RedirectToAction("Index", "Home"));
        }