Firebase Cookbook

How to do it...

1. On the authentication page we created, we now have the following options: 

Figure 12: Adding a Twitter authentication button

2. Now let's wire everything up with our JavaScript code, as shown in the following code:

      let twitterLogin =       document.getElementById('twitterLogin');      twitterLogin.addEventListener('click', () => {          //TODO: Add Logic here.      });

3. Before we move anywhere, we need to configure the twitterProvider object by using the following code line:

       var twitterProvider = new          firebase.auth.TwitterAuthProvider();

4. Now, let's exploit the Firebase authentication API calling with the help of the following code block:  ...