[keycloak-user] service account with offline tokens

Hi, We have application which has frontend and backend(running on glassfish), we have secured with keycloak for user authentication. Now have got other application X which provides RESTful service, these RESTful APIs are called as part of scheduled jobs from backend without user login. Can I use service account with offline tokens for calling RESTful API on AppX. Do i need to have different keycloak.json for REST API communication ? regards Ravi