code: async def async_main(context, credentials):
      
      conn = aiohttp.TCPConnector(limit=context.config['aiohttp_max_connections'])
      async with aiohttp.ClientSession(connector=conn) as session:
          context.session = session
          context.credentials = credentials
          await run_tasks(context)
docs: Set up and run tasks for this iteration.
  
      http://docs.taskcluster.net/queue/worker-interaction/
  
      Args:
          context (scriptworker.context.Context): the scriptworker context.