code: def display_name(self):
          
          for k in self._NAME_KEYS:
              if self._raw.get(k):
                  return self._raw[k]
              if "profile" in self._raw and self._raw["profile"].get(k):
                  return self._raw["profile"][k]
          return self._raw["name"]
docs: Find the most appropriate display name for a user: look for a "display_name", then
          a "real_name", and finally fall back to the always-present "name".