بنقرة واحدة
firebase-auth-basics
// Guide for setting up and using Firebase Authentication. Use this skill when the user's app requires user sign-in, user management, or secure data access using auth rules.
// Guide for setting up and using Firebase Authentication. Use this skill when the user's app requires user sign-in, user management, or secure data access using auth rules.
| name | firebase-auth-basics |
| description | Guide for setting up and using Firebase Authentication. Use this skill when the user's app requires user sign-in, user management, or secure data access using auth rules. |
| compatibility | This skill is best used with the Firebase CLI, but does not require it. Firebase CLI can be accessed through `npx -y firebase-tools@latest`. |
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", "http://localhost"]
}
}
}
}
[!NOTE] If the Google Sign-In popup opens and immediately closes with the error
[firebase_auth/unauthorized-domain], it means the domain is not authorized. For local development, ensurelocalhostis included in the Authorized Domains list in the Firebase Console or via theauthorizedDomainsfield infirebase.json. CRITICAL: Do NOT include the protocol or port number in the Authorized Domains list (e.g., uselocalhost, NOThttp://localhost:9090).
CRITICAL: After configuring firebase.json, you MUST deploy the auth configuration to the Firebase backend for the changes to take effect. This is essential for auth providers like Google Sign-In, email/password, etc. to auto-generate the necessary OAuth clients for your app platforms. Run:
npx -y firebase-tools@latest deploy --only auth
Enable other providers in the Firebase Console.
Web See references/client_sdk_web.md.
Flutter See references/flutter_setup.md. Android (Kotlin) See references/client_sdk_android.md.
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