user.php

См. документацию.

<?php
 
declare (strict_types=1);
 
namespace Bitrix\Socialnetwork\Integration\Extranet;
 
use Bitrix\Extranet\Service\ServiceContainer;
use Bitrix\Main\Loader;
 
class User
{
    public static function isCollaber(int $userId): bool
    {
        if (!Loader::includeModule('extranet'))
        {
            return false;
        }
 
        return
            ServiceContainer::getInstance()
                ->getCollaberService()
                ->isCollaberById($userId)
        ;
    }
}