How to force user login only one device at a time ?

[rockfight]

Thank you Brandin,

I created the following sample code

PHP Code:

<?php require_once '../../users/init.php'; ?>
<?php
$remove =[3];
removePermission($remove, 2);
// $add = [3];
// addPermission($add, 2,'user' 


If I browse this file by logging in as admin from browser than the permission is changed successfully. But if I put it into cron than the permission is not changed. May be that has to do with the init.php which requires login. How can I successfully implement this in cron.