Nefungujúci vlastný autentifikátor

Zdravím, snažím sa rozbehať vlastný autentikátor pripojený na databázu podla návodu https://doc.nette.org/…thentication#… avšak neustále mi to vyhadzuje chyby, tá posledná bola: Class MyAuthenticator used in service ‚authenticator‘ not found or is not instantiable.

Config.neon:

#
# WARNING: it is CRITICAL that this file & directory are NOT accessible directly via a web browser!
# https://nette.org/en/security-warning
#
parameters:


php:
	date.timezone: Europe/Prague


application:
	errorPresenter: Error
	mapping:
		*: App\*Module\Presenters\*Presenter


session:
	expiration: 14 days


services:
	- App\Model\UserManager
	- App\Forms\SignFormFactory
	- App\Model\MyAuthenticator
	router: App\RouterFactory::createRouter
	database: @Nette\Database\Connection
	authenticator: MyAuthenticator( @database )

MyAuthenticator.php uložený v app/model:

<?php

namespace App\Model;

use Nette;

class MyAuthenticator extends Nette\Object implements Nette\Security\IAuthenticator
{
    public $database;

    function __construct(Nette\Database\Context $database)
    {
        $this->database = $database;
    }

    function authenticate(array $credentials)
    {
        list($username, $password) = $credentials;
        $row = $this->database->table('reg')
            ->where('Nazov', $username)->fetch();

        if (!$row) {
            throw new Nette\Security\AuthenticationException('Používateľ sa nenašiel.');
        }

        if (!Nette\Security\Passwords::verify($password, $row->Heslo)) {
            throw new Nette\Security\AuthenticationException('Nesprávne heslo.');
        }

        return new Nette\Security\Identity($row->Id, $row->Role, array('username' => $row->Nazov));
    }
}

Neviete kde robím chybu? Ďakujem.