code: def add_member_to_group(self, group_id, member_id):
          
          route_values = {}
          if group_id is not None:
              route_values['groupId'] = self._serialize.url('group_id', group_id, 'str')
          if member_id is not None:
              route_values['memberId'] = self._serialize.url('member_id', member_id, 'str')
          self._send(http_method='PUT',
                     location_id='45a36e53-5286-4518-aa72-2d29f7acc5d8',
                     version='5.0-preview.1',
                     route_values=route_values)
docs: AddMemberToGroup.
          [Preview API] Add a member to a Group.
          :param str group_id: Id of the Group.
          :param str member_id: Id of the member to add.