docs: protected String produceTicketIdentifier() {
          val pgtId = this.ticketGrantingTicketUniqueTicketIdGenerator.getNewTicketId(ProxyGrantingTicket.PROXY_GRANTING_TICKET_PREFIX);
          if (this.cipherExecutor == null) {
              return pgtId;
          }
          LOGGER.debug("Attempting to encode proxy-granting ticket [{}]", pgtId);
          val pgtEncoded = this.cipherExecutor.encode(pgtId);
          LOGGER.debug("Encoded proxy-granting ticket id [{}]", pgtEncoded);
          return pgtEncoded;
      }