How can I register a username in Firebase?

Question

I am trying to implement the registration of a username in Firebase since it only gives me methods that are like the createUserWithEmailAndPassword(), but you can n

Answer 1

If you're using email/password auth with a username instead, you can simply index the users to email addresses in a sep path. Then when a user authenticates, look up their email in the index:

/user_to_email_index/$user_name/ https://www.firebase.com/docs/web/guide/login/custom.html