Below url gaves the user\'s facebook page till yesterday. But it\'s not working anymore.
https://www.facebook.com/app_scoped_user_id/xxxxxxxxxxxxx/
Is there
Unfortunately, Facebook have chosen to disable the ability to resolve app scoped user IDs, so this feature is now gone. Seems they havent yet responded to people registrered to the bug to let them know.
https://developers.facebook.com/blog/post/2018/04/19/facebook-login-changes-address-abuse/