I have a problem here. I have three parameters which I want to check if they go along together:
- an app id
- an page id
- an impersonated app access token for manage_pages permission for the
given page id.
What I want to do now is to check if the given app really can access and manage the given page with the given access token.
In detail – I want to check if the app could post on the pages wall in behalf of the page.
Access https://graph.facebook.com/pageID?fields=access_token&access_token=… and if it returns a valid result, that means you have proper manage_pages permission, which is the permission you need to post images as an admin of the page.