*/
    public long getAuthenticationTTL() {
        return this.authenticationTTL;
    }

    /**
     * Reset the authentication timestamp to current time
     */
    public void resetAuthenticationTimestamp() {
        this.authenticationTimestamp = System.currentTimeMillis();
    }

    @Override
    public void close() {
        if (closed) {
            return;
        }

        try {

        // Wait for expiration
        Thread.sleep(150);

        // Should be expired now
        assertTrue(auth.isExpired());

        // Reset timestamp
        auth.resetAuthenticationTimestamp();
        assertFalse(auth.isExpired());

        // Test with no expiration (TTL = 0)
        auth.setAuthenticationTTL(0);
        Thread.sleep(100);
        assertFalse(auth.isExpired());