Only login on one device at the same time

Hi everone,
Currently, I am finding for solutions to solve problem with login on one device at the same time.

On Nextcloud, can we block or alarm about login one account with 2 devices at the same time?

I don’t know if that’s possible. With Nextcloud clients and offline data at the latest, it no longer makes any sense… But if you believe that this is a security function, then I’m afraid I have to disappoint you. For real security, you need something like 2FA and then your requirement no longer plays a role. Can you describe why you think this is useful?

No this is against the nature of Nextcloud.

There are various apps on devices: Deck, Calendar syncs, the Nextcloud native Client, Talk, Passwords plugins to browsers and then everything you do through the browser itself.