How to use the @openid/appauth/built/node_support/node_requestor.NodeRequestor function in @openid/appauth

} from "@openid/appauth/built/token_request_handler";
import {
  TokenError,
  TokenResponse
} from "@openid/appauth/built/token_response";
import EventEmitter = require("events");

import { log } from "./logger";
import { StringMap } from "@openid/appauth/built/types";

export class AuthStateEmitter extends EventEmitter {
  static ON_TOKEN_RESPONSE = "on_token_response";
}

/* the Node.js based HTTP client. */
const requestor = new NodeRequestor();

/* an example open id connect provider */
const openIdConnectUrl = "https://accounts.google.com";

/* example client configuration */
const clientId =
  "511828570984-7nmej36h9j2tebiqmpqh835naet4vci4.apps.googleusercontent.com";
const redirectUri = "http://127.0.0.1:8000";
const scope = "openid";

export class AuthFlow {
  private notifier: AuthorizationNotifier;
  private authorizationHandler: AuthorizationRequestHandler;
  private tokenHandler: TokenRequestHandler;
  readonly authStateEmitter: AuthStateEmitter;

throw new Error('Configuration is not specified.');
    }
    log.debug(config);
    log.debug(action);
    log.debug(tokenStoreHander);
    this.config = config;
    this.action = action;
    this.tokenStoreHander = tokenStoreHander || function(token) {log.debug(token);};
    this.authConfiguration = new AuthorizationServiceConfiguration(
      config.authorizationEndPoint,
      config.tokenEndPoint
    );
    this.notifier = new AuthorizationNotifier();
    this.authorizationHandler = new NodeBasedHandler(
      config.redirectPort, new IoTHubQueryStringUtils());
    this.requestor = new NodeRequestor();
    this.tokenHandler = new IoTHubTokenRequestHandler(this.requestor);
    this.authorizationHandler.setAuthorizationNotifier(this.notifier);
    this.notifier.setAuthorizationListener((request, response, error) => {
      if (error) {
        log.error(error);
        return this.action.invalidAccessToken(error);
      }
      if (response) {
        if (this.authState !== response.state) {
          return this.action.invalidAccessToken(resources.auth_msg_invalid_access_token);
        }
        this._performWithInitTokenRequest(response.code)
        // .then(accessToken => this._performWithFreshTokens(accessToken))
        .then(accessToken => {
          log.debug(accessToken);
          log.debug(accessToken.toJson);