src/main/java/org/keycloak/protocol/cas/endpoints/ServiceValidateEndpoint.java

@@ -22,7 +22,7 @@
    protected Response successResponse() {
        UserSessionModel userSession = clientSession.getUserSession();
        Map<String, Object> attributes = getUserAttributes();
        CASServiceResponse serviceResponse = ServiceResponseHelper.createSuccess(userSession.getUser().getUsername(), attributes);
        CASServiceResponse serviceResponse = ServiceResponseHelper.createSuccess(userSession.getUser().getUsername(), attributes, this.pgtIou, null);
        return prepare(Response.Status.OK, serviceResponse);
    }