public IActionResult OrderDetails()
        {
            var username = User.Identity.Name;

            if (username != null)
            {
                var orderId = _orderDetailsService.GetOrderId(username);

                var list = _orderDetailsService.GetOrderDetails(orderId);
                //viewbag = to pass the total in the html.
                ViewBag.total = _orderDetailsService.Subtotal(orderId, username);

                return(View(list));
            }
            else
            {
                return(View());
            }
        }