code: def add_members(self, members):
          
          if not isinstance(members, list):
              members = [members]
  
          if not getattr(self, 'members', None):
              self.members = members
          else:
              self.members.extend(members)
docs: Add a new member to the members list
  
          :param members: member name
          :type members: str
          :return: None