docs: def server_close(self):
          """
          Closes the socket server and any associated resources.
          """
          self.log.debug("Closing the socket server connection.")
          TCPServer.server_close(self)
          self.queue_manager.close()
          self.topic_manager.close()
          if hasattr(self.authenticator, 'close'):
              self.authenticator.close()
          self.shutdown()