*/
    public String getDomainName() {
        return this.domainName;
    }

    /**
     * Returns the user's Security Identifier (SID).
     * @return the user SID
     */
    public SID getUserSid() {
        return this.userSid;
    }

    /**
     * Returns the user's primary group SID.
     * @return the primary group SID
     */
    public SID getGroupSid() {
        return this.groupSid;

        when(logonInfo.getLogonScript()).thenReturn("logon.bat");
        when(logonInfo.getUserAccountControl()).thenReturn(0x200);
        when(logonInfo.getUserFlags()).thenReturn(0);
        when(logonInfo.getUserSid()).thenReturn(userSid);
        when(logonInfo.getGroupSid()).thenReturn(new SID("S-1-5-21-1-2-3-513"));
        when(logonInfo.getGroupSids()).thenReturn(new SID[0]);
        when(logonInfo.getExtraSids()).thenReturn(new SID[0]);

    //                                                                      Implementation
    //                                                                      ==============
    @Override
    public String getUserId() {
        return user.getName();
    }

    // ===================================================================================
    //                                                                            Accessor

        final Map<String, String> valueMap = new LinkedHashMap<>();
        valueMap.put("action", Action.LOGIN.name());
        valueMap.put("user", user.map(FessUserBean::getUserId).orElse("-"));
        valueMap.put("permissions",
                user.map(u -> stream(u.getPermissions()).get(stream -> stream.collect(Collectors.joining(permissionSeparator))))

        if (!getUserBean().isPresent()) {
            logger.warn("User session not found during password change");
            return redirect(LoginAction.class);
        }
        final String username = getUserBean().get().getUserId();
        try {
            userService.changePassword(username, form.newPassword);
            saveInfo(messages -> messages.addSuccessChangedPassword(GLOBAL));
        } catch (final Exception e) {

            chatSessionManager.clearSession(form.sessionId, getUserId());
        }
        return redirect(getClass());
    }

    /**
     * Returns the user ID for the current session. If the user is authenticated, returns the username;
     * otherwise, returns the guest user code.
     *
     * @return the user ID
     */
    protected String getUserId() {
        final String username = systemHelper.getUsername();

    }

    @Test
    public void test_defaultConstructor() {
        final ChatSession session = new ChatSession();
        assertNotNull(session.getSessionId());
        assertNull(session.getUserId());
        assertNotNull(session.getCreatedAt());
        assertNotNull(session.getLastAccessedAt());
        assertNotNull(session.getMessages());
        assertTrue(session.getMessages().isEmpty());
    }

 * Provides access to user identification information.
 */
public interface FessCredential {

    /**
     * Gets the user ID for this credential.
     * @return The user ID.
     */
    String getUserId();

            logger.warn("User session not found during password change - potential session timeout or security issue");
            return redirect(LoginAction.class);
        }
        final String username = getUserBean().get().getUserId();
        try {
            userService.changePassword(username, form.password);
            saveInfo(messages -> messages.addSuccessChangedPassword(GLOBAL));
        } catch (final Exception e) {

     * @param password the password
     */
    public LocalUserCredential(final String user, final String password) {
        super(user, password);
    }

    @Override
    public String getUserId() {
        return getUser();
    }