try {
            if (isConnected() && this.usageCount.get() != 0) {
                log.warn("Session was not properly released, performing emergency cleanup: " + this);
                // Perform emergency cleanup to prevent memory leaks
                emergencyCleanup();
            }
        } catch (Exception e) {
            log.error("Error during session finalization", e);
        } finally {
            super.finalize();

                return fessConfig.getRoleSearchGroupPrefix();
            }
        }
        return null;
    }

    /**
     * Escapes special characters in an LDAP search filter to prevent LDAP injection attacks.
     *
     * <p>This method escapes the following characters as per RFC 4515:
     * <ul>
     * <li>\ (backslash) → \5c</li>
     * <li>* (asterisk) → \2a</li>

    protected Cache<String, Pair<String[], String[]>> groupCache;

    /** Group cache expiry time in seconds. */
    protected long groupCacheExpiry = 10 * 60L;

    /** Maximum depth for processing nested groups to prevent infinite loops. */
    protected int maxGroupDepth = 10;

    /** Use V2 endpoint. */
    protected boolean useV2Endpoint = true;

    /**
     * Initializes the Entra ID authenticator.