}

        Credentials creds = builder.action().getCreds();
        builder.destroy();

        KerberosTicket ticket = Krb5Util.credsToTicket(creds);
        System.out.println("Ends " + ticket.getEndTime().getTime());
        return ticket;
    }


    /**
     * @param principal
     * @return
     * @throws RealmException
     */