api-firebase-auth
Patterns for implementing secure user authentication with Firebase Auth.
Works with
---
name: api-firebase-auth
description: Patterns for implementing secure user authentication with Firebase Auth.
license: MIT
---
# Firebase Authentication
## Purpose
Simplify user management with Firebase Authentication. This skill covers setting up multiple providers (Email/Password, Google, GitHub) and managing user sessions securely.
## Usage
### 1. Email/Password Sign-Up
```javascript
import { getAuth, createUserWithEmailAndPassword } from "firebase/auth";
const auth = getAuth();
createUserWithEmailAndPassword(auth, email, password)
.then((userCredential) => {
// Signed in
const user = userCredential.user;
})
.catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
});
```
### 2. Google Sign-In
```javascript
import { getAuth, signInWithPopup, GoogleAuthProvider } from "firebase/auth";
const provider = new GoogleAuthProvider();
const auth = getAuth();
signInWithPopup(auth, provider)
.then((result) => {
// This gives you a Google Access Token. You can use it to access the Google API.
const credential = GoogleAuthProvider.credentialFromResult(result);
const token = credential.accessToken;
// The signed-in user info.
const user = result.user;
}).catch((error) => {
// Handle Errors here.
});
```
### 3. Auth State Observer
```javascript
import { getAuth, onAuthStateChanged } from "firebase/auth";
const auth = getAuth();
onAuthStateChanged(auth, (user) => {
if (user) {
// User is signed in
const uid = user.uid;
} else {
// User is signed out
}
});
```
## Resources
- [Firebase Auth Docs](https://firebase.google.com/docs/auth)More Security skills
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