* Default constructor for AuthenticationManager.
     */
    public AuthenticationManager() {
        // Default constructor
    }

    /**
     * Inserts a new user across all authentication chains.
     * @param user The user to insert.
     */
    public void insert(final User user) {
        chains().of(stream -> stream.forEach(c -> c.update(user)));
    }

    /**

     */
    public OptionalEntity<RelatedContent> getRelatedContent(final String id) {
        return relatedContentBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a related content entity.
     * After storing, updates the related content helper to refresh the cache.
     *
     * @param relatedContent the RelatedContent entity to store
     */

     */
    public OptionalEntity<RelatedQuery> getRelatedQuery(final String id) {
        return relatedQueryBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a related query in the database.
     * After storing, the related query helper is updated to refresh the cache.
     *
     * @param relatedQuery the RelatedQuery entity to store
     */

     */
    public OptionalEntity<BoostDocumentRule> getBoostDocumentRule(final String id) {
        return boostDocumentRuleBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a boost document rule.
     * @param boostDocumentRule The boost document rule to store.
     */
    public void store(final BoostDocumentRule boostDocumentRule) {

     */
    public OptionalEntity<DuplicateHost> getDuplicateHost(final String id) {
        return duplicateHostBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a duplicate host configuration.
     *
     * <p>This method immediately refreshes the index to ensure the change is visible.
     * If the configuration already exists (based on ID), it will be updated;

        asyncManager.async(() -> {
            insertLogin(user);
        });
    }

    /**
     * Inserts a login record for the given member.
     * Currently this method does nothing.
     *
     * @param member the member to insert a login record for
     */
    protected void insertLogin(final Object member) {
        // nothing
    }

    /**

                    }
                });

    }

    /**
     * Inserts or updates a user in LDAP directory.
     *
     * @param user the user object to insert or update
     */
    public void insert(final User user) {
        if (!fessConfig.isLdapAdminEnabled(user.getName())) {
            return;
        }

    }

    /**
     * Inserts a new character mapping item into the dictionary file.
     *
     * @param item the character mapping item to insert
     */
    @Override
    public synchronized void insert(final CharMappingItem item) {
        try (MappingUpdater updater = new MappingUpdater(item)) {
            reload(updater);

    public OptionalEntity<User> getUserByName(final String username) {
        return userBhv.selectEntity(cb -> {
            cb.query().setName_Equal(username);
        });
    }

    /**
     * Stores (inserts or updates) a user in the system.
     * Handles user authentication setup and database persistence.
     * If the surname is blank, it will be set to the user's name.
     *
     * @param user the user entity to store

     * @return an optional containing the item if found
     */
    public abstract OptionalEntity<T> get(long id);

    /**
     * Inserts a new dictionary item.
     *
     * @param item the item to insert
     */
    public abstract void insert(T item);

    /**
     * Updates an existing dictionary item.
     *
     * @param item the item to update
     */