public static function installUserMembershipTypeKey($pkg)
    {
        $app = \Concrete\Core\Support\Facade\Application::getFacadeApplication();
        $service = $app->make('Concrete\Core\Attribute\Category\CategoryService');
        $categoryEntity = $service->getByHandle('user');
        $category = $categoryEntity->getController();
 
        $key = $category->getAttributeKeyByHandle('membership_type');
        if (!is_object($key)) {
            $key = new UserKey();
            $key->setAttributeKeyHandle('membership_type');
            $key->setAttributeKeyName('Membership Type');
            $key->setIsAttributeKeySearchable(false);
            $key->setAttributeKeyEditableOnRegister(true);
 
            $key = $category->add('select', $key, self::setSelectSettings(['Publisher', 'Reader']) , $pkg);
        }
    }
 
    private function setSelectOptions($optionsArray, $list){
 
        $options = array();
        $displayOrder = 0;
        foreach($optionsArray as $option){
            $opt = new SelectValueOption();
            $opt->setSelectAttributeOptionValue($option);
            $opt->setDisplayOrder($displayOrder);
            $opt->setOptionList($list);
            if (is_object($opt)) {
                $options[] = $opt;
                ++$displayOrder;
            }
        }
        return $options;
    }
 
    private function setSelectSettings($optionsArray){
        $select_settings = new SelectSettings();
        $list = new SelectValueOptionList();
        $list->setOptions(self::setSelectOptions($optionsArray,$list));
        $select_settings->setOptionList($list);
        return $select_settings;
    }
        }