[keycloak-user] run code at login

[Matthew Broadhead]

i am using TomEE 7.0.3.  i am trying to execute code when the user first 
authenticates in order to log the ip address and username.  i tried 
implementing @WebListener public class SessionListener implements 
HttpSessionListener
but the session is created before the redirect to the login system so 
KeycloakPrincipal<KeycloakSecurityContext> is not available at that point.