Radius Server Set Hotspot Cookie Authentication Duration

I am using tekRadius to authenticate users for my routerOS hotspot. The system is working but all users are authenticated for 3 days. I believe this setting is coming from the default hotspot server configs in the routerOS. I need to set the cookie authentication duration from the Radius server.

Put another way:

if user 1 logs into the hotspot I would like the Radius server to authenticate them for 30 mins
and if
user 2 logs into the hotspot I would like the Radius server to authenticate them for 3 hrs

is this possible? any help would be greatly appreciated