getFCMToken method
Implementation
Future<String?> getFCMToken({FirebaseMessaging? instance}) async {
instance ??= FirebaseMessaging.instance;
if (Platform.isIOS) {
var apns = await instance.getAPNSToken();
debugPrint('FCM APNS Token: $apns ');
}
var firebase = await instance.getToken();
debugPrint('FCM Token: $firebase');
return firebase;
}