public static void main(String[] args) {

        CountDownLatch latch = new CountDownLatch(1);

        Whatsapp whatsapp = Whatsapp.mobileBuilder()
                .serializer(WhatsappSerializerProvider.get())
                .lastConnection()
                .device(CompanionDevice.android(false))
                .unregistered()
                .verificationCodeMethod(VerificationCodeMethod.SMS)
                .verificationCodeSupplier(() -> {
                    System.out.println("Enter OTP: ");
                    var scanner = new Scanner(System.in);
                    return scanner.nextLine();
                })
                .register(XXXXXXXXXL)
                .join()
                .addLoggedInListener(api -> System.out.printf("Connected: %s%n", api.store().privacySettings()))
                .addDisconnectedListener(reason -> System.out.printf("Disconnected: %s%n", reason))
                .addNewChatMessageListener(message -> System.out.printf("New message: %s%n", message.toJson()))
                .connect()
                .join();

        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            System.out.print("Shutting down...");
            whatsapp.disconnect();
            latch.countDown();
        }));

        Jid jid = Jid.of(YYYYYYYYYYL);
        boolean hasWhatsapp = whatsapp.hasWhatsapp(jid).join().hasWhatsapp();
        System.out.println("Has whatsapp " + hasWhatsapp);

        try {
            latch.await();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }