[FirebasAuth] added that Errors are thrown via a PlatformException (#146)
[FirebasAuth] added that Errors are thrown via a PlatformException (#146)

* added docs that Errors are thrown via a PlatformException
firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire,firebase/flutterfire