[keycloak-user] Get user roles in AngularJS from WildFly adapter

I have a WAR application that packages some JAX-RS services and an AngularJS UI talking to them. No classic HTML/JSF stuff at all. The app is running on WildFly and the Keycloak adapter with authentication is already working and I can e.g. secure the JAX-RS endpoints with @RolesAllowed etc. My question is now what the recommended way is to get user role information in the AngularJS part of the app? Since the authentication is not done in JS I don't think keycloak.js would work? Can/should the keycloak.js adapter get combined with the WildFly adapter or is there a different way to get something like kc.hasRealmRole() to work? Thanks