code: def add_token(self, token, token_handler, request):
          
          # Only add a hybrid access token on auth step if asked for
          if not request.response_type in ["token", "code token", "id_token token", "code id_token token"]:
              return token
  
          token.update(token_handler.create_token(request, refresh_token=False))
          return token
docs: :param token:
          :param token_handler: A token handler instance, for example of type
                                oauthlib.oauth2.BearerToken.
          :param request: OAuthlib request.
          :type request: oauthlib.common.Request