The user's Facebook-side id (fbid_v2 of the profile info; for the viewer's own profile the session's fbidV2). The app sends the query before another profile's info has arrived with an empty id; pass '' for that call.
fbid_v2
fbidV2
''
The user's Facebook-side id (
fbid_v2of the profile info; for the viewer's own profile the session'sfbidV2). The app sends the query before another profile's info has arrived with an empty id; pass''for that call.