initializeOneSignal function

Implementation

Future<void> initializeOneSignal() async {
  OneSignal.initialize(appStore.oneSignalAPIKey);
  await Future.delayed(const Duration(seconds: 3), () async {
    OneSignal.Notifications.requestPermission(false);
    OneSignal.User.pushSubscription.optIn();
    isOneSignalInitialize = true;
    await saveOneSignalPlayerId();
  });
}