getResponse().setStatus(Status.CLIENT_ERROR_METHOD_NOT_ALLOWED);
return null;
} else {
Group group = fetchGroup(user);
if (group!=null) {
if (user.removeGroup(group)) {
getResponse().setStatus(Status.SUCCESS_NO_CONTENT);
return null;
} else {
getResponse().setStatus(Status.CLIENT_ERROR_NOT_FOUND);
return null;