code: def event_sources(ctx, command):
      
      if command == 'list':
          click.echo('listing event sources')
          event_sources = ctx.list_event_sources()
          for es in event_sources:
              click.echo('arn: {}'.format(es['arn']))
              click.echo('starting position: {}'.format(es['starting_position']))
              click.echo('batch size: {}'.format(es['batch_size']))
              click.echo('enabled: {}'.format(es['enabled']))
          click.echo('done')
      elif command == 'enable':
          click.echo('enabling event sources')
          ctx.enable_event_sources()
          click.echo('done')
      elif command == 'disable':
          click.echo('disabling event sources')
          ctx.disable_event_sources()
          click.echo('done')
docs: List, enable, and disable event sources specified in the config file