private URI calculateURI() {
        return UriBuilder.fromUri(options.getApiManagerUri())
                         .path("events")
                         .path("sso")
                         .path("users")
                         .build();
    }
Process a {@link org.keycloak.events.EventType#REGISTER} and send to Apiman Manager API via HTTP.
sso/keycloak/extensions/src/main/java/io/apiman/manager/sso/keycloak/event/processors/NewUserEventProcessor.java