cleaning up and breaking down the app delegate conversion with swiftui to understand what's happening form firebase

nirvana-ios/nirvana_iosApp.swift

@@ -11,21 +11,20 @@ import GoogleSignIn
 
 @main
 struct nirvana_iosApp: App {
-    @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate
-    var body: some Scene {
+    @UIApplicationDelegateAdaptor private var appDelegate: AppDelegate
+      var body: some Scene {
         WindowGroup {
-            ContentView()
+          ContentView()
         }
-    }
+      }
 }
 
-class AppDelegate: NSObject, UIApplicationDelegate{
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions:
-                     [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
-        FirebaseApp.configure()
-        
-        return true
-    }
+
+class AppDelegate: NSObject, UIApplicationDelegate {
+  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
+    FirebaseApp.configure()
+    return true
+  }
     
     func application(_ application: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any]) -> Bool {
         return GIDSignIn.sharedInstance.handle(url)