Handler for cancellation

[jirkaakres]

Is there any way to be notified that user cancelled the authentication (eg. by clicking back key on android or Done on iOS)? So far I haven't found any way to be notified about this, the promise simply doesn't execute neither .then nor .error. What am I missing?

[BrendanBerkley]

I tried a solution for Facebook auth on Android where I had an event listener for AppState. But going into the Facebook screen doesn't seem to change the app's state at all.