code: def get_member(self, username, api=None):
          
          api = api if api else self._API
  
          response = api.get(
              url=self._URL['member'].format(id=self.id, username=username),
          )
          data = response.json()
          return Member(api=api, **data)
docs: Fetches information about a single volume member
          :param username: Member name
          :param api: Api instance
          :return: Member object