aMember (site.php): Different Menu for member and affiliate

site.php

<?php

//replace standard menu with affiliate specific if currently logged in user is affiliate
$di = Am_Di::getInstance();
if ($di->auth->getUserId() && $di->auth->getUser()->is_affiliate) {
    $n = new Am_Navigation_User();
    $n->addMenuPages('_aff');
    $di->setService('navigationUser', $n);
}

//add menu item to admin interface (edit affiliate menu)
Am_Di::getInstance()->hook->add(Am_Event::ADMIN_MENU, function(Am_Event $e){
    if ($page = $e->getMenu()->findOneById('configuration')) {
        $page->addPage([
            'id' => 'menu-aff',
            'label' => 'Affiliate Menu',
            'uri' => $e->getDi()->url('admin-menu', ['menu_id' => '_aff'])
        ]);
    }
});

//add icon for admin menu item
Am_View_Helper_Icon::$src['menu-aff'] =
    'data:image/png;base64,' .
    'iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAACoSURBVCjPY/jPAIMMCgxmYKiAEAOKwhmMDGZ//v/5/+M/qhI0BW/+gxQBlTDiUPDl/3v8Cn7//4VfwR/cVkB8kfI27S0WR+7rm/ui70X7i9YX88O7whtflANh7ouUPqgCBsbZLyBGAq1hRLBiX4BZiODBxgIpgAWPOYM/BgukGCl4En9jsswYkIIHKIzBgiiABg9QGINlxoAUPEBhDJYZwhdmDDZYWAoAtTEEdnXdy7IAAAAASUVORK5CYII=';