func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .alert, .sound]) { [weak self] granted, error in
            if granted {
                print("Permission granted")
            } else {
                print("Permission not granted")
            }
        }
        return true
    }