What does onAuthStateChanged do?

AngularFireAuth. user provides you an Observable<User|null> to monitor your application’s authentication State . AngularFireAuth promise proxies an initialized firebase.

Firebase Authentication provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app . It supports authentication using passwords, phone numbers, popular federated identity providers like Google, Facebook and Twitter, and more.

onAuthStateChanged. Adds an observer for changes to the user’s sign-in state .24 Eyl 2021

The createUserWithEmailAndPassword() function returns a so-called Promise , which has methods catch() and then() . You’re already using catch() to handle problems. To handle “non-problems”, you need to use then() : firebase. auth().