Is there any documentation for error responses from social providers? We are running some analytics snapshots, and some posts to Facebook will return a snapshot with 500 response. One of these has a very useful USER_IS_NO_LONGER_AUTHENTICATED error message, which I assume means the user de-authed our FB application.
Other have just a generic RESPONSE_IS_UNKNOWN. What would be the circumstances that we would get this error returned? In both cases that I see this error, I'm also not seeing the "message": "Message still exists" in the snapshot. I'm assuming the user deleted the content from their feed, but did not de-auth our app. But of course it's not clear.