swiftUI | Missing arguments...

Good day,

I'am learning swiftUI since this week but at this point I'am seriously disappointed. I've been trying to fix this issue since +4hrs, but I don't get it...

Maybe you guys will help me..

Error messages:

▶︎ HomePageView.swift:63:37 Missing argument for parameter 'forUser' in call

▶︎ HomePageView.swift:375:22 Missing argument for parameter 'dataManager' in call

▶︎ LoginPageView.swift:28:38 Missing argument for parameter 'dataManager' in call

▶︎ LoginPageView.swift:131:26 Value of type 'LoginPageView' has no member 'getUserData'

Here you will have Code snippets:

LoginPageView.swift

import SwiftUI
import CoreData
import Firebase

struct LoginPageView: View {
    @State private var email: String = ""
    @State private var password: String = ""
    @State private var isAuthenticated = false
    @State private var showAlert = false
    @State private var errorMessage: String = ""
    @Environment(\.scenePhase) private var scenePhase // Beobachtet den Lebenszyklus der Szene

    @ObservedObject var dataManager = UserDataManager()
    
    var body: some View {
            NavigationView {
                ZStack {
                    Color(hex: "f6f1eb").edgesIgnoringSafeArea(.all)

                    if isAuthenticated {
                        HomePageView()
                    } else {
                        loginForm
                    }
                }
                .navigationTitle(isAuthenticated ? "" : "")
                .navigationBarHidden(isAuthenticated)
                .onChange(of: scenePhase) { newPhase in
                    if newPhase == .background {
                        logout()
                    }
                }
                .onAppear {
                    checkAuthentication()
                }
            }
        }
code-block

HomePageView.swift

struct HomePageView: View {
    @ObservedObject var dataManager: UserDataManager
        
        init(dataManager: UserDataManager) {
            self.dataManager = dataManager
        }
        
    
    var body: some View {
        NavigationView {
            ZStack {
                Color(hex: "f6f1eb")
                    .edgesIgnoringSafeArea(.all)
                VStack {
                    UserProfileView(userRole: dataManager.userRole, userEmail: dataManager.userEmail)
                        .frame(height: 100)
                    Divider()
                    SidebarView()
                }
            }
        }
        .onAppear {
            dataManager.getUserData()
            
        }
        .navigationBarTitle("Split View")
    }
}

struct HomePageView_Previews: PreviewProvider {
    static var previews: some View {
        HomePageView()
    }
}
code-block

DataManager.swift

class UserDataManager: ObservableObject {
    @Published var userRole: String = "Loading..."
    @Published var userEmail: String = "Loading..."
    
    func getUserData(forUser userId: String) {
        let db = Firestore.firestore()
        db.collection("UserRole").document(userId).getDocument { (document, error) in
            if let document = document, document.exists {
                if let data = document.data() {
                    if let role = data["Role"] as? String, let email = data["EMailAddress"] as? String {
                        // Speichern Sie die Benutzerrolle und E-Mail-Adresse in Ihrem UserDataManager
                        self.userRole = role
                        self.userEmail = email
                    }
                }
            } else {
                print("Document does not exist")
            }
        }
    }
}
 
code-block

Thanks in advance for your help and insights. I appreciate your support and look forward to your responses.