Having issues creating custom object from postHook Register snippet

<object class="Subscriber" table="subscribers" extends="xPDOObject">
	<field key="customernbr" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" index="pk" generated="native"/>
	<field key="user" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" default="0"/>
	<index alias="PRIMARY" name="PRIMARY" primary="true" unique="true">
		<column key="customernbr" collation="A" null="false"/>
	</index>

	<aggregate alias="User" class="modUser" local="user" foreign="id" cardinality="one" owner="foreign"/>
	<composite alias="Subscription" class="Subscription" local="customernbr" foreign="customernbr" cardinality="many" owner="local"/>
</object>

<object class="Subscription" table="subscriptions" extends="xPDOSimpleObject">
	<field key="customernbr" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" default="0"/>
	<field key="date" dbtype="datetime" phptype="datetime" null="true"/>
	<field key="type" dbtype="varchar" precision="60" phptype="string" null="false" default=""/>
	<field key="time" dbtype="varchar" precision="60" phptype="string" null="false" default=""/>

	<aggregate alias="Subscriber" class="Subscriber" local="customernbr" foreign="customernbr" cardinality="one" owner="foreign"/>
</object>

<?php
$magazinemgmt = $modx->getService('magazinemgmt','MagazineManagement',$modx->getOption('magazinemgmt.core_path',null,$modx->getOption('core_path').'components/magazinemanagement/').'model/magazinemanagement/',$scriptProperties);
if (!($magazinemgmt instanceof MagazineManagement)) return '';

$user = $hook->getValue('register.user');

$subscriber = $magazinemgmt->modx->newObject('Subscriber');
$subscriber->set('user', $user->get('id'));
$subscriber->save();

class MagazineManagement {
	public $modx = null;
	public $config = array();

	function __construct(modX &$modx,array $config = array()) {
		$this->modx =& $modx;

		$corePath = $this->modx->getOption('magazinemgmt.core_path',$config,$this->modx->getOption('core_path').'components/magazinemanagement/');
		$assetsPath = $this->modx->getOption('magazinemgmt.assets_path',$config,$this->modx->getOption('assets_path').'components/magazinemanagement/');
		$assetsUrl = $this->modx->getOption('magazinemgmt.assets_url',$config,$this->modx->getOption('assets_url').'components/magazinemanagement/');

		$this->config = array_merge(array(
			'corePath' => $corePath,
			'modelPath' => $corePath.'model/',
			'processorsPath' => $corePath.'processors/',
			'controllersPath' => $corePath.'controllers/',
            'templatesPath' => $corePath.'templates/',
			'chunksPath' => $corePath.'elements/chunks/',
			'snippetsPath' => $corePath.'elements/snippets/',

			'assetsUrl' => $assetsUrl,
			'cssUrl' => $assetsUrl.'css/',
			'jsUrl' => $assetsUrl.'js/',
			'connectorUrl' => $assetsUrl.'connector.php',
		),$config);

		$this->modx->addPackage('magazinemanagement',$this->config['modelPath']);
		
		$this->initDebug();
	}
}

$magazinemgmt = $modx->getService('magazinemgmt','MagazineManagement',$modx->getOption('magazinemgmt.core_path',null,$modx->getOption('core_path').'components/magazinemanagement/').'model/magazinemanagement/');

var_dump(class_exists('Subscriber')); die;

$subscriber = $magazinemgmt->modx->newObject('Subscriber');

$subscriber = $modx->newObject('Subscriber');

<?php
class Subscriber extends xPDOObject {}

<?php
require_once (dirname(dirname(__FILE__)) . '/subscriber.class.php');
class Subscriber_mysql extends Subscriber {}

<?php
$xpdo_meta_map['Subscriber']= array (
  'package' => 'magazinemanagement',
  'version' => NULL,
  'table' => 'subscribers',
  'extends' => 'xPDOObject',
  'fields' => 
  array (
    'customernbr' => NULL,
    'user' => 0,
  ),
  'fieldMeta' => 
  array (
    'customernbr' => 
    array (
      'dbtype' => 'int',
      'precision' => '10',
      'attributes' => 'unsigned',
      'phptype' => 'integer',
      'null' => false,
      'index' => 'pk',
      'generated' => 'native',
    ),
    'user' => 
    array (
      'dbtype' => 'int',
      'precision' => '10',
      'attributes' => 'unsigned',
      'phptype' => 'integer',
      'null' => false,
      'default' => 0,
    ),
  ),
  'indexes' => 
  array (
    'PRIMARY' => 
    array (
      'alias' => 'PRIMARY',
      'primary' => true,
      'unique' => true,
      'columns' => 
      array (
        'customernbr' => 
        array (
          'collation' => 'A',
          'null' => false,
        ),
      ),
    ),
  ),
  'composites' => 
  array (
    'Subscription' => 
    array (
      'class' => 'Subscription',
      'local' => 'customernbr',
      'foreign' => 'customernbr',
      'cardinality' => 'many',
      'owner' => 'local',
    ),
  ),
  'aggregates' => 
  array (
    'User' => 
    array (
      'class' => 'modUser',
      'local' => 'user',
      'foreign' => 'id',
      'cardinality' => 'one',
      'owner' => 'foreign',
    ),
  ),
);