Hello I Am new in React Native can you please tell me ho to get Native Module return value

I want this promise value in App.js class with button click. Please help me in finding out the solution.

@ReactMethod

public void initTimerService(Promise promise)
{

    TimerService timerService = App42API.buildTimerService();
    String timerName = "<Enter_your_timer_name>";
    long timeInSeconds= 120;
    timerService.createOrUpdateTimer(timerName, timeInSeconds, new App42CallBack() {
        public void onSuccess(Object r)
        {
            Log.e(TAG,"response = "+r);
            Timer timer = (Timer)response;
            promise.resolve(timer.getName());
            System.out.println("Timer Name is: "+timer.getName());
            System.out.println("Time is: "+timer.getTimeInSeconds());
        }

    });



}