public IActionResult AddProduct(Product product)
        {
            if (!string.IsNullOrEmpty(product.ProductName))
            {
                try
                {
                    var result = restService.CreateProduct(product).Result;
                    if (product != null)
                    {
                        return(View(result));
                    }
                }
                catch (Exception e)
                {
                    ViewBag.Error = e.Message;
                }
            }

            return(View());
        }