Admin Console (Community) import username password roles from oracle db to hibernate

Hi guys,

Sorry, I'm newbies. Would like to know, is it possible to import username, password, roles from oracle db to hibernate sql (default used by Pentaho)? or is there any other solution to use username, password and roles directly from oracle db without import to hibernate sql.

Currently I'm working with the Pentaho Community BI 4.8.0-stable.

Thanks.