public IActionResult Create(Create_product_viewmodel model)
        {
            Product product;

            if (ModelState.IsValid)
            {
                if (model.photo != null)
                {
                    Upload_photo(model.photo);
                }
                product = new Product {
                    Name = model.Name, Rate = 0, NewPrice = 0, Category = model.Category, photo = model.photo.FileName, Price = model.Price, ShopID = UserManager.GetUserId(HttpContext.User)
                };
                _Iproduct.AddProduct(product);

                return(RedirectToAction("Index"));
            }
            return(View());
        }