Fix typing error in code

src/service/product.rs

@@ -43,10 +43,9 @@ impl ProductService {
                 String::from("Product not found."),
             ));
         }
-
-        NotificationService.notify(&product.product_type, "DELETED", product.clone());
         let product: Product = product_opt.unwrap();
 
+        NotificationService.notify(&product.product_type, "DELETED", product.clone());
         return Ok(Json::from(product));
     }