public async Task <IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return(Page());
            }

            Order.OrderId = Guid.NewGuid();
            Order.User    = "******"; // Pretend this is from the user's session

            await _serviceBus.SendOrderToQueue(Order);

            return(RedirectToPage("./Index"));
        }