Access.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Controller;
 
use Bitrix\Im\V2\Chat;
use Bitrix\Im\V2\Message;
 
class Access extends BaseController
{
    public function checkAction(?Chat $chat = null, ?Message $message = null): ?array
    {
        return ['result' => true]; // All checks are done in prefilters
    }
}