rn-authlisted

# React Native Authentication (Expo) ## Core Patterns ### Expo AuthSession for OAuth Use `expo-auth-session` with `expo-web-browser` for OAuth flows: ```typescript import * as AuthSession from 'expo-auth-session'; import * as WebBrowser from 'expo-web-browser'; import * as Google from 'expo-auth-session/providers/google'; // Critical: Call this at module level for proper redirect handling WebBrowser.maybeCompleteAuthSession(); // Inside component const [request, response, promptAsync] = Google.useAuthRequest({ iosClientId: 'YOUR_IOS_CLIENT_ID.apps.googleusercontent.com', webClientId: 'YOUR_WEB_CLIENT_ID.apps.googleusercontent.com', // For backend verification scopes: ['profile', 'email'], }); ``` ### Common Pitfalls 1. **Missing `maybeCompleteAuthSession()`** - Auth redirects fail silently without this at module level 2. **Wrong client ID** - iOS needs the iOS client ID, but backend verification needs the web client ID 3. **Scheme mismatch** - `app.json` scheme must match Google Cloud Console redirect URI 4. **Expo Go vs standalone** - Different redirect URIs; use `AuthSession.makeRedirectUri()` to handle both ### Token Storage Use `expo-secure-store` for tokens (not AsyncStorage): ```typescript import * as SecureStore from 'expo-secure-store'; const TOKEN_KEY = 'auth_token'; const REFRESH_KEY = 'refresh_token'; export const tokenStorage = { async save(token: string, refresh?: string) { await SecureStore.setItemAsync(TOKEN_KEY, token); if (refresh