docs: def adduser(name, username, **kwargs):
      '''
      Add a user to a group
  
      Args:
  
          name (str):
              The name of the group to modify
  
          username (str):
              The name of the user to add to the group
  
      Returns:
          bool: ``True`` if successful, otherwise ``False``
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' group.adduser foo username
      '''
      try:
          group_obj = _get_group_object(name)
      except pywintypes.com_error as exc:
          msg = 'Failed to access group {0}. {1}'.format(
              name, win32api.FormatMessage(exc.excepinfo[5]))
          log.error(msg)
          return False
  
      existing_members = [_get_username(x) for x in group_obj.members()]
      username = salt.utils.win_functions.get_sam_name(username)
  
      try:
          if username not in existing_members:
              group_obj.Add('WinNT://' + username.replace('\\', '/'))
              log.info('Added user %s', username)
          else:
              log.warning('User %s is already a member of %s', username, name)
              return False
      except pywintypes.com_error as exc:
          msg = 'Failed to add {0} to group {1}. {2}'.format(
              username, name, win32api.FormatMessage(exc.excepinfo[5]))
          log.error(msg)
          return False
  
      return True