query.setStartUsername(null);
allUsers = new UserFeed();
UserFeed currentPage;
Link nextLink;
do {
currentPage = userService.query(query, UserFeed.class);
allUsers.getEntries().addAll(currentPage.getEntries());
nextLink = currentPage.getLink(Link.Rel.NEXT, Link.Type.ATOM);
if (nextLink != null) {
retrieveUrl = new URL(nextLink.getHref());
}