# Block user login if he's already logged in on another device

**URL:** <https://discourse.getcockpit.com/t/block-user-login-if-hes-already-logged-in-on-another-device/2231>\
**Category:** Support\
**Created:** [January 19, 2022, 12:50pm UTC](https://discourse.getcockpit.com/t/block-user-login-if-hes-already-logged-in-on-another-device/2231 "2022-01-19T12:50:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![johndoe](https://avatars.discourse-cdn.com/v4/letter/j/65b543/32.png) [@johndoe](https://discourse.getcockpit.com/u/johndoe)\
**Post date:** [January 19, 2022, 12:50pm UTC](https://discourse.getcockpit.com/t/block-user-login-if-hes-already-logged-in-on-another-device/2231/1 "2022-01-19T12:50:54Z")

</div>

Hi!  
I’d like to prevent a user from login when he is already logged in on other device or other browser.  
Could you tell me how can achieve this?

I’ve found some infor about `$_SESSION['cockpit.app.auth']['user']` but how can I use it?