code: def session_token(self):
          
          session_token = None
          if self.user_id is not None:
              session_token = token_getter(self.remote)
          if session_token:
              token = RemoteToken.get(
                  self.user_id, self.remote.consumer_key,
                  access_token=session_token[0]
              )
              return token
          return None
docs: Return OAuth session token.