firebase-auth-basics

Set up Firebase Authentication with multiple identity providers and secure data access rules. 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: 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.