ios – Find out how to swap screens with SwiftUI

I’m making an attempt to create a easy transition from the signup view to the principle tab view. I’m utilizing navigation hyperlink to modify screens and it’s giving me a error on the entry level

Sort ‘Tailor_HelperApp’ doesn’t conform to protocol ‘App’

How do I arrange this code to efficiently transition from the signup display to the principle tab view?

@primary
struct Tailor_HelperApp: App {
    let consumer: Person
    @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate
    var physique: some Scene {
        WindowGroup {
            ContentView().environmentObject(AuthViewModel())

        }

struct ContentView: View {
 let consumer: Person
    @EnvironmentObject var viewModel: AuthViewModel
    var physique: some View {
        Group{
            if viewModel.userSession == nil {
                SignUp(consumer: consumer)
            }else{
                if let consumer = viewModel.currentUser {
                    
                    MainTabView(consumer: consumer)
                }

let consumer: Person
    @EnvironmentObject var viewModel: AuthViewModel
    var physique: some View {
        
        Button{
            viewModel.register(withEmail: electronic mail, password: password, picture: picture, username: username)

            
        }label: {
          NavigationLink(vacation spot: MainTabView(consumer: consumer)) { 
            Textual content("Signal Up")
            
                .font(.headline)
                .foregroundColor(.white)
                .body(width: 360, peak: 50)
                .background(Colour.black)
                .clipShape(Capsule())
                .cornerRadius(25)
                .padding()
            
        }
        .offset(y:190)
        
        
        Spacer()

}