Get User Display Name from Firebase VerifyToken

Question

I have a custom back-end to which the client send the login firebase token which the server verifies and gets the decoded token, for the most part it contains enough information but I need the display name of the user with it to sync it with other clients, I can however make this by calling admin.auth().getuser(uid) I want to avoid making extra call and have other round trip just to get the display name.
Maybe I am overthinking but Isn't there a way to get that in a single call with verifyToken?

Answer 1

DecodedIdToken has many optional properties that are not explicitly listed. You can access them by treating the DecodedIdToken as a map. Following works as expected for me:

const admin = require('firebase-admin');

admin.initializeApp({
  projectId: '...',
})

const token = '....';
admin.auth().verifyIdToken(token)
  .then((decodedIdToken) => {
    console.log(decodedIdToken.name); // Get user's display name
    // decodedIdToken['name'] if you're on TypeScript
  });

The name property is only present when the user has signed in using a provider that exposes that information (such as google auth).