code: def get_nested_group_users(self, groupname):
          
  
          response = self._get(self.rest_url + "/group/user/nested",
                               params={"groupname": groupname,
                                       "start-index": 0,
                                       "max-results": 99999})
  
          if not response.ok:
              return None
  
          return [u['name'] for u in response.json()['users']]
docs: Retrieves a list of all users that directly or indirectly belong to the given groupname.
  
          Args:
              groupname: The group name.
  
  
          Returns:
              list:
                  A list of strings of user names.