From firebase
Guides Firebase Authentication setup for user sign-in with email/password, Google, anonymous providers; covers user management, ID tokens, CLI provisioning, and security rules for secure data access.
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- **Firebase Project**: Created via `npx -y firebase-tools@latest projects:create` (see `firebase-basics`).
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npx -y firebase-tools@latest projects:create (see firebase-basics).firebase-basics).Firebase Authentication provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app.
A user is an entity that can sign in to your app. Each user is identified by a unique ID (uid) which is guaranteed to be unique across all providers.
User properties include:
uid: Unique identifier.email: User's email address (if available).displayName: User's display name (if available).photoURL: URL to user's photo (if available).emailVerified: Boolean indicating if the email is verified.Firebase Auth supports multiple ways to sign in:
Google Sign In is recommended as a good and secure default provider.
When a user signs in, they receive an ID Token (JWT). This token is used to identify the user when making requests to Firebase services (Realtime Database, Cloud Storage, Firestore) or your own backend.
Only Google Sign In, anonymous auth, and email/password auth can be enabled via CLI. For other providers, use the Firebase Console.
Configure Firebase Authentication in firebase.json by adding an 'auth' block:
{
"auth": {
"providers": {
"anonymous": true,
"emailPassword": true,
"googleSignIn": {
"oAuthBrandDisplayName": "Your Brand Name",
"supportEmail": "support@example.com",
"authorizedRedirectUris": ["https://example.com"]
}
}
}
}
Enable other providers in the Firebase Console.
Web See references/client_sdk_web.md.
Secure your data using request.auth in Firestore/Storage rules.