Is it possible to enable Firebase email authentication but disable sign in?

Question

In my app, I\'m already using the Firebase authentication with Google accounts, but I\'d also like to authorize some users who have no Google account. So I\'d like to manually a

Answer 1

Firebase Auth doesn't provide official tooling to limit email siginup to specific emails, or allow login but disable signup.

The next best things you could do is

• Write a cloud function to listen to user creation, and delete them as soon as they are created.
• Assign custom claim token to the "approved" user account, and only provide access to these user with custom claim token.

Below is a sample code which limit signup to specific emails https://code.luasoftware.com/tutorials/firebase/setup-firebase-authentication-with-vuejs/