@SuppressWarnings("unchecked")
	private boolean haveSuchUser(String pernr) {
		List<Map<String, String>> userList = new ArrayList<Map<String,String>>();
		try {
			if (pernr.contains("|")) {
				String pernrs[] = pernr.split("[|]");
				for (String p : pernrs) {
					userList = new ObjectMapper().readValue(service.getUsers(p), List.class);
				}
			} else {
				userList = new ObjectMapper().readValue(service.getUsers(pernr), List.class);
			}
			if (userList.size() > 0) return true; 
		} catch (JsonParseException e) {
			e.printStackTrace();
		} catch (JsonMappingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return false;
	}