code: protected void sendUserCredentials() throws UnknownHostException {
      this.getTracePrintStream().printf("user = %s, host = %s, name = %s%n", System.getProperty("user.name"), InetAddress.getLocalHost().getHostName(), super.getName());
    }
docs: Collects some user credentials and sends them over the network.
  
  @throws java.net.UnknownHostException if the local host name could not be resolved into an address