module.php

public function getServiceConfig()
    {
        return array(
            'factories' => array(
                'auth' => function(ServiceManager $sm) {
                    $db = $sm->get('Zend\Db\Adapter\Adapter');
                    $authAdapter = new \Zend\Authentication\Adapter\DbTable\CallbackCheckAdapter(
                        $db,
                        'users',
                        'username',
                        'password',
                        function($hash, $password) use($sm) {
                            $cfg = $sm->get('config');
                            $options = $cfg['auth\Config'];
                            return password_verify($hash, $password);
                        }
                    );

                    $storage = new \Zend\Authentication\Storage\Session('Authentication');

                    $service = new \Zend\Authentication\AuthenticationService($storage, $authAdapter);
                    
                    return $service;
                }
            )
        );
    }