OpenWrt connection to freeradius

We have FreeRadius on linux server for ppp so we access routers (Mikrotik, Cisco) using this. So we have central user database. Now on network we have some routers with OPENWRT, so can they be connected to same freeradius so same useres from database can accees and manage openwrt routers (http and ssh), after nessesary config ?
We don't want to store user and pass local on router
We don't want to use this for hotspot auth JUST for auth and log to router

should be doable, since you can specify a remote radius server to provide validation of credentials...
start trying and ask later for help if you stuck doing something. And please if you success post your findings.