Integration with Firebase

Login to https://console.firebase.google.com

Open the Project ID (if it exists, if not, create one)

Go to Authentication and click Web Setup

Copy the code

<script src="https://www.gstatic.com/firebasejs/4.6.0/firebase.js"></script>
<script>
  // Initialize Firebase
  var config = {
    apiKey: "xxx",
    authDomain: "xxxx",
    databaseURL: "xxx",
    projectId: "xxx",
    storageBucket: "xxx",
    messagingSenderId: "261160364741"
  };
  firebase.initializeApp(config);
</script>

Check Firebase section to finish.