I have followed the procedure at
https://developers.facebook.com/docs/instagram-basic-display-api/getting-started
The last step of step2 is the deauthorization callback;
When I enter a callback url for it, it does call my endpoint correctly, however it's just an HTTP POST and does not contain any body or query parameters or anything I can use to figure out which user deauthorized. I think I'm missing something here.
The instructions guide you to this
https://developers.facebook.com/docs/games/gamesonfacebook/login#parsingsr
But again the HTTP POST still does not give me that signed_request.
My app is still in development status on the dashboard. This may be the problem but I don't think it is or should be because I should be able to test without releasing.
Please let me know if you know how to figure out the user who deauthorized your app.
Thanks!