How to use return redirect() in helper or BaseController

redirect() method is working perfectly on the controller but when trying to use it in helper or BaseController, it's not accepting returns.
I tried this code but didn't work on both helper and BaseController

PHP Code:

$session = \Config\Services::session();
$user_data = $session->get(); 


PHP Code:

if(!($user_data['user']['user_type'] == 1 && $user_data['user']['is_active'] == 1 && $user_data['user']['isLoggedIn'] == 1)){            
    // return redirect()->to('admin'); 
    // header("Location: admin");
    // die;
    // $this->response->setHeader('Location', site_url('admin'));
    // return redirect()->to(site_url());
    return redirect()->route('admin');
}

How to access it or is it possible or not???