docs: def attach_user(context, id, user_id):
      """attach_user(context, id, user_id)
  
      Attach a user to a remoteci.
  
      >>> dcictl remoteci-attach-user [OPTIONS]
  
      :param string id: ID of the remoteci to attach the user to [required]
      :param string user_id: ID of the user to attach [required]
      """
      result = remoteci.add_user(context, id=id,
                                 user_id=user_id)
      utils.format_output(result, context.format, ['remoteci_id', 'user_id'])