code: func (t *TestTLSServer) Close() error {
  	err := t.TLSServer.Close()
  	if t.Listener != nil {
  		t.Listener.Close()
  	}
  	if t.AuthServer.Backend != nil {
  		t.AuthServer.Backend.Close()
  	}
  	return err
  }
docs: // Close closes the listener and HTTP server