Add Extra Details on Firebase User Table

Firebase stores the email/password users in a separate location, that you don't have direct access to. You cannot expand the data in this location.

Since many application developers want to access the user data in their application code, it is a common practice to store all users under a /users node inside the application database itself. The disadvantage is that you have to do this yourself. But the positive side of this is that you can store any extra information if you want.

See the Firebase guide on storing user data for sample code. From there:

var ref = new Firebase("https://<YOUR-FIREBASE-APP>.firebaseio.com");
ref.onAuth(function(authData) {
  if (authData && isNewUser) {
    // save the user's profile into Firebase so we can list users,
    // use them in Security and Firebase Rules, and show profiles
    ref.child("users").child(authData.uid).set({
      provider: authData.provider,
      name: getName(authData)
    });
  }
});

NOTE: This method only works if you are using Firebase Admin SDK and you need to have end point on your server to manage custom tokens

Firebase Admin SDK has an option to create custom tokens with additional claims object, which can contain arbitrary data. This might be useful to store some user related info, like whether the user is premium user or not.

Additional claims data is accessible using auth object.

example

var uid = "some-uid"; //this can be existing user UID
var additionalClaims = {
   premiumAccount: true,
   some-user-property: 'some-value'
};

admin.auth().createCustomToken(uid, additionalClaims)
  .then(function(customToken) {
     // Send token back to client
  })
  .catch(function(error) {
     console.log("Error creating custom token:", error);
});

additionalClaims are also accessible in Firebase security rules.

for more info read Firebase Custom Tokens

A Firebase User has a fixed set of basic properties—a unique ID, a primary email address, a name and a photo URL—stored in the project's user database, that can be updated by the user (iOS, Android, web). You cannot add other properties to the Firebase User object directly; instead, you can store the additional properties in your Firebase Realtime Database.

Firebase has a fixed set of user properties which can be updated but not added on to.

However you can add small amounts of data with the help of serialization and deserialization using JSON.stringify() and JSON.parse()

And then use any one of the unused properties to store the string

either in DisplayName, or photoURL property. Keep in mind the data that can be added has to be small in size and stored as a string.

And this can be only possible with using the method in the FIREBASE SDK and not the angularfire as illustrated below

var user = firebase.auth().currentUser;

user.updateProfile({
  displayName: "Jane Q. User",
  photoURL: "https://example.com/jane-q-user/profile.jpg"
}).then(function() {
  // Update successful.
}, function(error) {
  // An error happened.
});

You could store more json like data in the photoURL or displaYName variable in the form of string here.