ios – Can’t sign in after signing out using Firebase Auth

If I create a user in Firestore Auth console and then login via app it’s fine. However, if I create a user via my app, log out, and then attempt to login – it throws the following error and I’m not logged in.

Any help would be appreciated thank you. I’m not so familiar with Firebase. I have been following this tutorial.

Error:

Error Domain=FIRAuthErrorDomain Code=17004 “The supplied auth credential is malformed or has expired.” UserInfo={NSLocalizedDescription=The supplied auth credential is malformed or has expired., FIRAuthErrorUserInfoNameKey=ERROR_INVALID_CREDENTIAL}

RegistrationView

import SwiftUI

struct RegisterView: View {
    @EnvironmentObject var viewModel: AuthViewModel
    @State var email: String = ""
    @State var name: String = ""
    @State var password: String = ""

    var body: some View {
        VStack(alignment: .leading) {
            Text("Register")

            //
            TextField("Name", text: $name)

            //
            TextField("Email", text: $email)
                .textInputAutocapitalization(.never)
                .keyboardType(.emailAddress)
                .textCase(.lowercase)
            
            //
            SecureField("Password", text: $password)

            //
            Spacer()

            //
            Button("Sign Up") {
                Task {
                    try await viewModel.register(name: name, email: email, password: email)
                }
            }
        }
    }
}

LoginView

import SwiftUI

struct LoginView: View {
    @EnvironmentObject var viewModel: AuthViewModel
    @State var email: String = ""
    @State var password: String = ""

    var body: some View {
        NavigationStack {
            VStack(alignment: .leading) {
                Text("Login")

                //
                TextField("Email", text: $email)
                    .textInputAutocapitalization(.never)
                    .keyboardType(.emailAddress)
                    .textCase(.lowercase)

                //
                SecureField("Password", text: $password)

                //
                Spacer()

                //
                Button("Login") {
                    Task {
                        try await viewModel.login(email: email, password: password)
                    }
                }

                NavigationLink("Sign up") {
                    RegisterView()
                }
            }
        }
    }
}

AuthViewModel

import SwiftUI
import FirebaseAuth
import FirebaseFirestoreSwift
import FirebaseFirestore

final class AuthViewModel: ObservableObject{
    @Published var userSession: FirebaseAuth.User?
    @Published var currentUser: User?

    init() {
        // Read from Firestore cache on device if logged in
        self.userSession = Auth.auth().currentUser
    }

    func login(email: String, password: String) async throws {
        do {
            let result = try await Auth.auth().signIn(withEmail: email, password: password)
            self.userSession = result.user
            try await fetch()
        } catch {
            print(error)
        }
    }

    func register(name: String, email: String, password: String) async throws {
        do {
            let result = try await Auth.auth().createUser(withEmail: email, password: password)
            self.userSession = result.user

            //
            let user = User(id: result.user.uid, name: name, email: email)
            let encodeUser = try Firestore.Encoder().encode(user)
            try await Firestore.firestore().collection("users").document(user.id).setData(encodeUser)

            //
            try await fetch()
        } catch {
            print("Failed to create user", error)
        }
    }

    func signout() {
        do {
            try Auth.auth().signOut()
            self.userSession = nil
            self.currentUser = nil
        } catch {
            print(error)
        }
    }

    func deleteAccount() {
    }

    func fetch() async throws {
        guard let uid = Auth.auth().currentUser?.uid else { return }
        let snapshot = try await Firestore.firestore().collection("users").document(uid).getDocument()
        self.currentUser = try snapshot.data(as: User.self)
    }
}