if (_instance == null) {
Connector connector = config.getConnectors().getConnector(0);
SchemeType scheme = connector.getScheme();
String url = ConfigHelper.getAdminURL(scheme, config);
SecurityConfiguration security =
config.getSecurityConfiguration();
if (security.getSecurityEnabled()) {
CreateLogonDialog.instance().displayCreateLogon();
if (CreateLogonDialog.instance().isConfirmed()) {
username = CreateLogonDialog.instance().getName();
password = CreateLogonDialog.instance().getPassword();