code: def add_user_to_group(self, GroupID, UserID):
          
          # http://teampasswordmanager.com/docs/api-groups/#add_user
          log.info('Add User %s to Group %s' % (UserID, GroupID))
          self.put('groups/%s/add_user/%s.json' % (GroupID, UserID))
docs: Add a user to a group.