code: def handle(self, *args, **options):
          
          username = options['catalog_user']
  
          # Before we do a whole bunch of database queries, make sure that the user we were passed exists.
          try:
              User.objects.get(username=username)
          except User.DoesNotExist:
              raise CommandError('A user with the username {} was not found.'.format(username))
  
          channels = self.get_integrated_channels(options)
  
          for channel in channels:
              channel_code = channel.channel_code()
              channel_pk = channel.pk
              transmit_content_metadata.delay(username, channel_code, channel_pk)
docs: Transmit the courseware data for the EnterpriseCustomer(s) to the active integration channels.