1. Log in to your app with Facebook Login.
  2. Go to your Facebook profile’s Apps and Websites settings tab: https://www.facebook.com/settings?tab=applications
  3. Remove your app.
  4. Click the View Removed Apps and Websites link.
  5. In the popup, click the View button to the right of the application.
  6. In the window, appeared click Send Request to trigger your callback.