Authentication

Firebase Authentication provides a secure and flexible system for identifying users across devices and sessions. It supports multiple sign-in methods and handles user identity, session management, and credential validation without requiring a custom backend.

The Authentication module in this plugin exposes the core Firebase Authentication workflows in a form suitable for Unreal Engine games and applications, covering both anonymous and credential-based sign-in flows.

Capabilities

Initialize the Firebase Authentication system.
Sign in users anonymously for guest or temporary sessions.
Create and sign in users using email and password credentials.
Sign in users with Google Sign-In.
Send password reset emails.
Send email verification messages.
Re-authenticate users for sensitive operations.
Sign out the current user.
Update user email and password.
Delete the authenticated user account.
Retrieve the current user's ID token.
Access basic profile information of the authenticated user.
Listen for authentication state changes.

Important Notes

Some authentication providers, such as Google Sign-In, require SHA certificate fingerprints to be registered in the Firebase project.
Re-authentication is required by Firebase before performing sensitive actions such as updating credentials or deleting a user account.
Authentication state listeners remain active and should be managed carefully to avoid duplicate callbacks.