Why do I receive an error stating onAuth is not a Function?

Question

I'm an app to fit the new firebase SDK. It compiles not problem but app will not display as I receive an error via console that stats onAuth is not a function

I've been through the upgrade process here: https://firebase.google.com/support/guides/firebase-web

Can't seem to get it to work

'use strict';

import Reflux from 'reflux';
import update from 'react-addons-update';
import Actions from '../actions/Actions';
require('firebase/auth');
require('firebase/database');
require('firebase/firestore');

var config = {
    apiKey: 'XXXXX',
    authDomain: 'XXXXXX',
    databaseURL: 'XXXXXX'
};

firebase.initializeApp(config);

const baseRef =  firebase.database().ref();
const usersRef = baseRef.child('users');

const defaultUser = {
    uid: '',
    username: '',
    upvoted: null,
    submitted: null,
    isLoggedIn: false,
    md5hash: null,
    latestPost: null
};

let currentUser = Object.assign({}, defaultUser);

const UserStore = Reflux.createStore({

    listenables: Actions,

    init() {
        // triggered by auth changes
        baseRef.onAuth((authData) => {
            if (!authData) {
                // user is logged out
                usersRef.off();
                this.logoutCompleted();
            } else {
                // user is logged in
                this.loginCompleted(authData.uid);
            }
        });
    },

    logout() {
        baseRef.unauth();
    },

Answer 1

baseRef is a Reference type object:

const baseRef =  firebase.database().ref();

As you can see from the API documentation, Reference doesn't have an method called onAuth or unauth. Not sure what you're trying to do here, but it's obviously not following the documented API.