Getting Exception about titanium-firebase HOT 3 CLOSED

var core = require('firebase.core');
var fcm = require('firebase.cloudmessaging');

// Configure core module (required for all Firebase modules)
core.configure();

// Called when the Firebase token is ready
fcm.addEventListener('didRefreshRegistrationToken', onToken);

// Called when direct messages arrive. Note that these are different from push notifications
fcm.addEventListener('didReceiveMessage', onMessage);

fcm.registerForPushNotifications();

function onToken(e) {
    Ti.API.info('Token', e.fcmToken);
}

function onMessage(e) {
    Ti.API.info('Message', e.message);
}

[ERROR] :  TiExceptionHandler: (main) [0,655] - Message: Uncaught Default FirebaseApp is not initialized in this process com.careclues.patient. Make sure to call FirebaseApp.initializeApp(Context) first.
[ERROR] :  TiExceptionHandler: (main) [0,655] - Source: 		fcm.registerForPushNotifications();
[ERROR] :  V8Exception: Exception occurred at /alloy/controllers/index.js:65: Uncaught Default FirebaseApp is not initialized in this process com.careclues.patient. Make sure to call FirebaseApp.initializeApp(Context) first.
[ERROR] :  V8Exception: Default FirebaseApp is not initialized in this process com.careclues.patient. Make sure to call FirebaseApp.initializeApp(Context) first.