Track and Handle Authentication Status

We’ve learned to sign up users, sign them out, and then sign them back in. Now, it’s time to learn how to set up a real-time listener to track users’ authentication status. This could be useful when we wish to perform certain actions based on whether or not a user is signed in.

Authentication state observers

For components of our application that need information about the signed-in user, we can attach an observer that is called whenever ...