[keycloak-user] Keycloak Even when user is authenticated

I am working on a web application (war) that uses keycloak for authentication/roles. The application is running on Wildfly 10. Using the wildfly keycloak adapter. I need to listen/detect when a user is authenticated by keycloak. There is some work the application must perform when a user is logged in for the first time. Is there some event (Observable message) , or some type of listener that I can register to get notified of this? (when a user is authenticated). Thanks to any tips/help Mario