rola pri registrácii nového užívateľa

Dobrý deň ked sa registruje nový užívateľ tak nie pridaná rola ako automalicky mu môžem priradiť hodnotu Guest. Používam UserManager čo by sommal editovať aby bola vložená hodnota v tabulke. Ďakujem za odpoved
Pri editovaní vypisuje
Missing argument 3 for App\Model\UserManager::add(), called in C:\xampp\htdocs\try\sandbox\app\presenters\RegisterPresenter.php on line 38 and defined

<?php

namespace App\Model;

use Nette;
use Nette\Security\Passwords;


/**
 * Users management.
 */
class UserManager extends Nette\Object implements Nette\Security\IAuthenticator
{
	const
		TABLE_NAME = 'users',
		COLUMN_ID = 'id',
		COLUMN_NAME = 'username',
		COLUMN_PASSWORD_HASH = 'password',
		COLUMN_ROLE = 'role';


	/** @var Nette\Database\Context */
	private $database;


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


	/**
	 * Performs an authentication.
	 * @return Nette\Security\Identity
	 * @throws Nette\Security\AuthenticationException
	 */
	public function authenticate(array $credentials)
	{
		list($username, $password) = $credentials;

		$row = $this->database->table(self::TABLE_NAME)->where(self::COLUMN_NAME, $username)->fetch();

		if (!$row) {
			throw new Nette\Security\AuthenticationException('The username is incorrect.', self::IDENTITY_NOT_FOUND);

		} elseif (!Passwords::verify($password, $row[self::COLUMN_PASSWORD_HASH])) {
			throw new Nette\Security\AuthenticationException('The password is incorrect.', self::INVALID_CREDENTIAL);

		} elseif (Passwords::needsRehash($row[self::COLUMN_PASSWORD_HASH])) {
			$row->update(array(
				self::COLUMN_PASSWORD_HASH => Passwords::hash($password),
			));
		}

		$arr = $row->toArray();
		unset($arr[self::COLUMN_PASSWORD_HASH]);
		return new Nette\Security\Identity($row[self::COLUMN_ID], $row[self::COLUMN_ROLE], $arr);
	}


	/**
	 * Adds new user.
	 * @param  string
	 * @param  string
	 * @return void
	 */
	public function add($username, $password, $role)
	{
		try {
			$this->database->table(self::TABLE_NAME)->insert(array(
				self::COLUMN_NAME => $username,
				self::COLUMN_PASSWORD_HASH => Passwords::hash($password),
				self::COLUMN_ROLE => $role,
			));
		} catch (Nette\Database\UniqueConstraintViolationException $e) {
			throw new DuplicateNameException;
		}
	}

}



class DuplicateNameException extends \Exception
{}

<?php

namespace App\Presenters;

use Nette;
use App\Model;
use App\Model\UserManager;


class RegisterPresenter extends BasePresenter
{
	private $userManager;
			protected function createComponentRegisterForm()
	{

   		$form = new Nette\Application\UI\Form;
		$form->addText('username', 'Username:')
			->setRequired('Please enter your username.');

		$form->addPassword('password', 'Password:')
			->setRequired('Please enter your password.');


		$form->addSubmit('send', 'Register');

		// call method signInFormSucceeded() on success
		$form->onSuccess[] = array($this, 'registerFormSucceeded');
		return $form;
	}

public function __construct (UserManager $userManager)
{
    $this->userManager = $userManager;
}

public function registerFormSucceeded ($form, $values)
{

    $this->userManager->add($values['username'], $values['password']);


    $this->flashMessage('User register.', 'success');
}

}

Editoval kasiopia (11. 2. 2016 1:20)