Method that acts as an entrypoint to our Scene based app

SceneDelegate.swift

// Method that acts as an entrypoint to our Scene based app
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Create the SwiftUI view that provides the window contents.
        let contentView = ContentView(viewModel: PhotoStreamViewModel())
        // Use a UIHostingController as window root view controller.
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            window.rootViewController = UIHostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }
}