How to integrate Freeradius with Oracle Database XE(18c)?

I have installed Freeradius and Oracle Database 18c XE. FreeRADIUS Version 3.0.20 -- it's working fine locally Oracle Database XE working fine. But I can not integrate Freeradius with Oracle Database. I need help regarding this How can I integrate Freeradius with oracle database. anyone can help? Thanks Nandi