Auth0.com authentication

Auth.js

import Auth0Lock from 'auth0-lock';
// import auth0 from 'auth0-js';
import decode from 'jwt-decode';
// import { browserHistory } from 'react-router';
import history from './history';


export default class Auth {

  lock = new Auth0Lock('GNx0zoCnEmuSz5T3JylON5hxEhMSe9Ki', 'artmarqet.auth0.com', {
    oidcConformant: true,
    autoclose: true,
    allowedConnections: ['Username-Password-Authentication', 'facebook', 'linkedin'],
    additionalSignUpFields: [{
      name: 'firstName',
      placeholder: 'Your first name',
      prefill: 'Barbara'
    },
    {
      name: 'lastName',
      placeholder: 'Your last name',
      prefill: 'Wright'
    }],
    auth: {
      redirectUrl: 'http://localhost:3000/callback',
      responseType: 'token id_token',
      audience: `https://artmarqet.auth0.com/userinfo`,
      params: {
        scope: 'email openid'
      }
    }
  });

  constructor() {
    this.handleAuthentication();
    // binds functions to keep this context
    this.login = this.login.bind(this);
    this.logout = this.logout.bind(this);
    this.isAuthenticated = this.isAuthenticated.bind(this);
  }

  login() {
    // Call the show method to display the widget.
    this.lock.show();
  }

  handleAuthentication() {
    // Add a callback for Lock's `authenticated` event
    this.lock.on('authenticated', this.setSession.bind(this));
    // Add a callback for Lock's `authorization_error` event
    this.lock.on('authorization_error', (err) => {
      console.log(err);
      alert(`Error: ${err.error}. Check the console for further details.`);
      history.replace('/home');
    });
  }

  setSession(authResult) {
    if (authResult && authResult.accessToken && authResult.idToken) {
      // Set the time that the access token will expire at
      let expiresAt = JSON.stringify((authResult.expiresIn * 1000) + new Date().getTime());
      localStorage.setItem('access_token', authResult.accessToken);
      localStorage.setItem('id_token', authResult.idToken);
      localStorage.setItem('expires_at', expiresAt);
      // navigate to the home route
      history.replace('/home');
    }
  }

  logout() {
    // Clear access token and ID token from local storage
    localStorage.removeItem('access_token');
    localStorage.removeItem('id_token');
    localStorage.removeItem('expires_at');
    // navigate to the home route
    history.replace('/home');
  }

  isAuthenticated() {
    // Check whether the current time is past the
    // access token's expiry time
    let expiresAt = JSON.parse(localStorage.getItem('expires_at'));
    return new Date().getTime() < expiresAt;
  }
}