CI 4 simple session auth system problem

Firstly I'm sorry for my very*100 bad Engilsh

Please help to solve this problem, and thank you in advance.
I am programming a site based on an simple session auth system, but I have had two problems .
- Let's take a look at the files:

BaseController.php Controller:

PHP Code:

<?php
namespace App\Controllers;

use CodeIgniter\Controller;

class BaseController extends Controller
{

    protected $helpers = [];

    protected $session;

    protected $validation;
    
    /**
     * Constructor.
     */
    public function initController(\CodeIgniter\HTTP\RequestInterface $request, \CodeIgniter\HTTP\ResponseInterface $response, \Psr\Log\LoggerInterface $logger)
    {
        // Do Not Edit This Line
        parent::initController($request, $response, $logger);
        
        //--------------------------------------------------------------------
        // Preload any models, libraries, etc, here.
        //--------------------------------------------------------------------
           $this->validation =  \Config\Services::validation();
          $this->session = \Config\Services::session();

        $this->session->start();

    }
    
    protected function loggedIn()
    {    
        if($this->session->has('loggedIn'))
        {
            return redirect()->to(base_url().'/dashboard/index');
            
        }
    }
    
    public function notLoggedIn()
    {        
        if(!$this->session->has('loggedIn'))
        {
            return redirect()->to(base_url().'/auth/index');
            
        }
    }    
} 


Auth.php Controller:

PHP Code:

<?php namespace App\Controllers;

use App\Models\AuthModel;

class Auth extends BaseController
{
    protected $authModel;

    public function __construct() {
    
           $this->authModel = new AuthModel();
        $this->loggedIn();
    }
        
    public function index()
    {

        $data = [
                'title'     => "Login Page"
        ];
        
        return view('pages/login', $data);
        

    } 


Problem 1: when i browse Auth (auth/index): Call to a member function has() on null Error...Even though I called and start session class/service from initController function in BaseController .
- When the problem is solved in a ugly way by call  session class/service inside loggedIn() function like this:

PHP Code:

protected function loggedIn()
 { 
      $this->session = \Config\Services::session();
 
        if($this->session->has('loggedIn'))
        {
            return redirect()->to(base_url().'/dashboard/index');
 
 }
 } 


The second problem: the function does not redirect to /dashboard/index, even  i'm sure a having a successful login and loggedIn = username not null or empty or false

Help..Thanks

Remove the following line from BaseController. It is not needed because the session library does this for you.

PHP Code:

$this->session->start(); 


That may be the reason $this->session is coming up null.

---

Try this change for loggedIn()

PHP Code:

protected function loggedIn()
{
    if ($this->session->has('loggedIn'))
    {
        return redirect()->to(base_url('dashboard/index'));
    }

    // then not logged in
    return redirect()->to(base_url('auth/index'));
} 


Then you can remove public function notLoggedIn()