[keycloak-user] Acquire access token using offline token

down vote favorite I am working on an offline NodeJS application which will call some REST API to perform some operation. This has no web UI etc. I was checking ways to get authentication token from keycloak using offline token. I can find method to get access token using grant object which uses username and password. GrantManager.prototype.obtainDirectly = function obtainDirectly (username, password, callback, scopeParam) { //Code } But I am looking a similar method which will take offline token and give me back authentication token? I see that ensureFreshness method does get a access_token for a refresh_token but it needs grant object as an input. Or somehow can I call all const in my NodeJS file and call nodeify method? Kind Regards Dheeraj Joshi