How to: Add Firebase to SwiftUI 2 (2020)

Step by step to make your iOS 12 app support Google Firebase.

Let’s open the Firebase Console first:
https://console.firebase.google.com/

We need to open a new project or use an existing one. After entering the project, click “Add Application”. Simply choose iOS as the application platform. Then, download the plist file and put it inside Xcode Project.