@Override
  protected JComponent createCenterPanel() {
    JPanel panel = new JPanel();
    panel.setLayout(new GridBagLayout());

    GridBagConstraints gb = new GridBagConstraints();

    // top label.
    gb.insets = JBUI.insets(2);
    gb.weightx = 1;
    gb.weighty = 0;
    gb.gridwidth = 2;
    gb.gridheight = 1;
    gb.gridx = 0;
    gb.gridy = 0;
    gb.anchor = GridBagConstraints.WEST;
    gb.fill = GridBagConstraints.HORIZONTAL;

    JLabel label = new JLabel(SvnBundle.message("label.auth.authentication.realm", myRealm));
    panel.add(label, gb);

    // user name
    gb.gridy += 1;
    gb.gridwidth = 1;
    gb.weightx = 0;
    gb.fill = GridBagConstraints.NONE;

    label = new JLabel(SvnBundle.message(myMode.equals(Mode.SSH_PASSPHRASE) ? "label.ssh.key.file" : "label.auth.user.name"));
    panel.add(label, gb);

    // user name field
    gb.gridx = 1;
    gb.weightx = 1;
    gb.fill = GridBagConstraints.HORIZONTAL;

    myUserNameText = new JTextField();
    panel.add(myUserNameText, gb);
    label.setLabelFor(myUserNameText);

    if (myUserName != null) {
      myUserNameText.setText(myUserName);
    }
    myUserNameText.selectAll();
    myUserNameText.getDocument().addDocumentListener(this);
    myUserNameText.setEnabled(myMode.equals(Mode.DEFAULT));

    gb.gridy += 1;
    gb.weightx = 0;
    gb.gridx = 0;
    gb.fill = GridBagConstraints.NONE;
    gb.gridwidth = 1;

    label = new JLabel(SvnBundle.message(myMode.equals(Mode.SSH_PASSPHRASE) ? "label.ssh.passphrase" : "label.auth.password"));
    panel.add(label, gb);

    // passworde field
    gb.gridx = 1;
    gb.weightx = 1;
    gb.fill = GridBagConstraints.HORIZONTAL;

    myPasswordText = new JPasswordField();
    panel.add(myPasswordText, gb);
    label.setLabelFor(myPasswordText);

    gb.gridy += 1;
    gb.gridx = 0;
    gb.gridwidth = 2;
    gb.weightx = 1;
    gb.fill = GridBagConstraints.HORIZONTAL;
    myAllowSaveCheckBox = new JCheckBox(SvnBundle.message("checkbox.auth.keep.for.current.session"));
    panel.add(myAllowSaveCheckBox, gb);
    gb.gridy += 1;
    if (! myAllowSave) {
      final JLabel cannotSaveLabel = new JLabel(SvnBundle.message("svn.cannot.save.credentials.store-auth-creds"));
      cannotSaveLabel.setForeground(NamedColorUtil.getInactiveTextColor());
      panel.add(cannotSaveLabel, gb);
      gb.gridy += 1;
    }
    panel.add(new JSeparator(), gb);

    myAllowSaveCheckBox.setSelected(false);
    myAllowSaveCheckBox.setEnabled(myAllowSave);

    return panel;
  }
@Override
  protected JComponent createCenterPanel()