Update app.js

app.js

@@ -163,13 +163,16 @@ app.post('/create-payment-link', express.json(), async (req, res) => {
     metadata: {
       userId,
     },
-    custom_fields: [
+    
+   /* custom_fields: [
       {
         display_name: 'User ID',
         variable_name: 'user_id',
         value: userId,
       },
     ],
+    */
+    
     // optional properties
     collect_phone,
     fixed_amount,