String url = "http://localhost:" + PORT + "/tenants/{tenantId}/groups/{groupName}";
System.out.println(">>> GET: " + url);
ClientRequest request = new ClientRequest(url);
request.pathParameter("tenantId", group.tenantId().id());
request.pathParameter("groupName", group.name());
String output = request.getTarget(String.class);
System.out.println(output);
RepresentationReader reader = new RepresentationReader(output);