protected function check_credentials($user, $password)
{
	if ( ! is_object($user))
	{
		$username = $user;

		// Load the user
		$user = ORM::factory('user');
		$user->where($user->unique_key($username), '=', $username)->find();
	}

	// If the passwords match, perform a login
	if ($user->has('roles', ORM::factory('role', array('name' => 'login'))) AND $user->password === $password)
	{
		return TRUE;
	}

	// Login failed
	return FALSE;
}