iOS SwiftUI + Firebase Google Authentication | iOS 18

In this step-by-step tutorial, we’ll integrate Firebase Authentication with Google Sign-In into a SwiftUI app. You’ll learn how to set up a Firebase project, enable Google as a provider, configure the reversed client ID in Xcode, and implement a clean MVVM flow for sign-in/sign-out with persistent sessions.

🔗 Source code for Complete Template : https://richaharsivo.gumroad.com/l/sw...
🎓 My full SwiftUI 6 + MVVM course: https://www.udemy.com/course/swiftui-...


What you’ll learn
Create and connect a Firebase project to your iOS app
Enable Google provider in Firebase Auth
Add GoogleService-Info.plist & configure URL Types (reversed client ID)
Implement the latest GoogleSignIn flow with SwiftUI
Use MVVM to manage auth state (login, logout, auto-restore)
Handle common errors & testing with test users on the OAuth consent screen

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