How do I configure firebase code on my app

Question

this is my error

Thread 1: "FirebaseApp.configure() could not find a valid GoogleService-Info.plist in your project. Please download one from https://console.firebase.google.com/."

this is my code

import SwiftUI
import Firebase


@main
struct Tour__20_Twitter_cloneApp: App {
  @StateObject var viewModel  = AuthViewModel()
    init() {
        FirebaseApp.configure()
    }
    
    
    
    var body: some Scene {
        WindowGroup {
            NavigationView  {
              ContentView()
            }
            .environmentObject(viewModel)
        }
    }
}