expo-google-auth

import ExpoGoogleAuth from 'expo-google-auth'; import { Alert } from 'react-native'; // For showing results in a real app const MY_GOOGLE_WEB_CLIENT_ID = process.env.GOOGLE_WEB_CLIENT_ID ?? 'YOUR_GWC_ID_HERE'; // Replace with your actual GWC ID async function signInWithGoogle() { if (MY_GOOGLE_WEB_CLIENT_ID === 'YOUR_GWC_ID_HERE') { Alert.alert('Configuration Error', 'Please replace YOUR_GWC_ID_HERE with your actual Google Web Client ID.'); return; } try { // Method 1: Latest, Recommended by Google const idToken = await ExpoGoogleAuth.launchGoogleAuth("GID", MY_GOOGLE_WEB_CLIENT_ID); if (idToken) { Alert.alert('Sign-in Successful', `Received ID Token: ${idToken.substring(0, 30)}...`); console.log('Google ID Token:', idToken); // Now, provide this id token to your backend auth provider } else { Alert.alert('Sign-in Failed', 'No ID token received.'); } } catch (error) { console.error('Google Sign-in Error:', error); Alert.alert('Sign-in Error', error.message || 'An unknown error occurred during Google sign-in.'); } } // Example of how to call it (e.g., from a button press in a React Native component) signInWithGoogle();