ZF2 getting doctrine service inside bootstrap zfcUser extendet event

I have been extending the ZfcUser I got the new fields working, and they are getting added to the db via doctrine2 no problem there. But now i need to add a links between the user and a payment table and a special Role system. Im trying to put this into the Event but i cant get a hold on the doctrine service. My onBootstrap looks like this.

public function onBootstrap( MVCEvent $e )
{
    $eventManager = $e->getApplication()->getEventManager();
    $em           = $eventManager->getSharedManager();
    $em->attach(
        'ZfcUser\Form\RegisterFilter',
        'init',
        function( $e )
        {
            $filter = $e->getTarget();

            // do your form filtering here 
            new Register\Filter($filter);

        }
    );

    // custom form fields

    $em->attach(
        'ZfcUser\Form\Register',
        'init',
        function($e)
        {
            /* @var $form \ZfcUser\Form\Register */
            $form = $e->getTarget();
            new Register\Form($form);
        }
    );

    // here's the storage bit

    $zfcServiceEvents = $e->getApplication()->getServiceManager()->get('zfcuser_user_service')->getEventManager();
    $doctrineObjectManager = $e->getApplication()->getServiceManager()->get('Doctrine\ORM\EntityManager');
    var_dump($e->getApplication()->getServiceManager()->get('zfcuser_user_service')->getEventManager()->getEvents()); 
    $zfcServiceEvents->attach('register', function($e){
        /* @var $user \User\Entity\User */
        //$form = $e->getParam('form');
        //print_r($form);
        //echo get_class($e);
        new Register\Storage($e);
        break;
    });

    // you can even do stuff after it stores           
    $zfcServiceEvents->attach('register.post', function($e) {
        /*$user = $e->getParam('user');*/
    });
}

Form and filter works, but i cant get access to docrtine service from within the anonymous event function. How do i do this?

Since you're doing this in onBootstrap() the MvcEvent has everything you need. You just need to fetch the entity manager and use it in your anonymous function

public function onBootstrap( MVCEvent $e )
{
    $eventManager = $e->getApplication()->getEventManager();
    $em           = $eventManager->getSharedManager();
    // fetch the entity manager
    $sm = $e->getApplication()->getServiceManager();
    $entityManager = $sm->get('Doctrine\ORM\EntityManager');

    $em->attach(
        'ZfcUser\Form\RegisterFilter',
        'init',
        // use the entity manager in your function
        function( $e ) use ($entityManager);
        {
            $filter = $e->getTarget();

            // variable $entityManager is now available in this scope
            // so we could for example inject it into the filter like so
            new Register\Filter($filter, $entityManager);                

        }
    );

I'm assuming the entity manager was the doctrine service you were referring to, but it's the same methodology to use other services in the scope of your anonymous functions.