Im trying to set up firebase authentication in my app. I have a SessionStore class which is an Observable object which manages the auth state and provides a sign up and sign in function.

I am trying to update the session in the sign up function instead of in the listen function however this is causing the value to be null when I try and get it in my UserView. However, if I set it in the listen function its getting the values perfectly fine.

I need to set it in the Sign Up function as I need access to the username and email that are passed into that function.

Let me know if you need to see other screens.

SessionStore.Swift

//
//  SessionStore.swift
//  Crep Collect
//
//  Created by Rex on 12/04/2021.
//

import SwiftUI
import Firebase
import Combine

class SessionStore : ObservableObject {

    var didChange = PassthroughSubject<SessionStore, Never>()
    @Published var session: User? { didSet { self.didChange.send(self) }}
    var handle: AuthStateDidChangeListenerHandle?
    @Published var isLoggedIn = false

    private var profileRepository = UserProfileRepository()

    func listen () {
        // monitor authentication changes using firebase
        handle = Auth.auth().addStateDidChangeListener { (auth, user) in
            if let user = user {
                self.isLoggedIn = true
                print("Got user: \(user)")

            //returns the value correctly when setting it in here
//                self.session = User(
//                    uid: user.uid,
//                    username: "hrfew",
//                    email: "heb@me.com"
//                )

            } else {
                self.isLoggedIn = false
                // if we don't have a user, set our session to nil
               // self.session = nil
                print("no user")
            }
        }
    }

    func signUp(email: String, password: String, username: String, completion: @escaping (_ profile: User?, _ error: Error?) -> Void) {
      Auth.auth().createUser(withEmail: email, password: password) { (result, error) in
        if let error = error {
          print("Error signing up: \(error)")
          completion(nil, error)
          return
        }

        guard let user = result?.user else { return }
        print("User \(user.uid) signed up.")

        let userProfile = User(uid: user.uid, username: username, email: email)
        self.profileRepository.createProfile(profile: userProfile) { (profile, error) in
          if let error = error {
            print("Error while fetching the user profile: \(error)")
            completion(nil, error)
            return
          }
                     // returns nil when setting it here

            self.session = User(uid: user.uid, username: username, email: email) //set session here not working

           // print(self.session)
          completion(profile, nil)
        }
      }
    }

    func signIn(
        email: String,
        password: String,
        handler: @escaping AuthDataResultCallback
        ) {
        Auth.auth().signIn(withEmail: email, password: password, completion: handler)
    }

    func signOut () -> Bool {
        do {
            try Auth.auth().signOut()
            self.session = nil
            return true
        } catch {
            return false
        }
    }

    func unbind () {
        if let handle = handle {
            Auth.auth().removeStateDidChangeListener(handle)
        }
    }

}