CakePHP 2.10.13 Custom PasswordHasher (PHP 7.3)

Need Help
1

Hey,

Controller/AppController.php

<?php
App::uses('Controller', 'Controller');
class AppController extends Controller {
  public $components = array(
    'Auth' => array(
      'authenticate' => array(
        'Form' => array(
          'fields' => array('username' => 'user_login', 'password' => 'user_pass'),
          'passwordHasher' => 'Custom'
        )
      )
    )
  );
}

Controller/Component/Auth/CustomPasswordHasher.php

<?php
App::uses('AbstractPasswordHasher', 'Controller/Component/Auth');
class CustomPasswordHasher extends AbstractPasswordHasher {
  public function hash($password) {
    return 'hello';
  }
  public function check($password, $hash) {
    return true;
  }
}

What is the problem?

I tried this with my custom pw hasher: Simple Authentication and Authorization Application - 2.x

Form data:

_method: POST
data[User][user_login]: abc
data[User][user_pass]: xyz

Thanks.