Auth utility to instantiate the Auth0

authenticate.js

import auth0 from 'auth0-js';
export default class Auth {
 constructor({domain, clientID, audience}) 
 {
  this.auth0 = new auth0.WebAuth({
   domain,
   clientID,
   redirectUri: `${window.location.origin}/authenticate`,
   audience,
   responseType: 'token id_token',
   scope: 'openid profile email',
  });
}
login() {
 this.auth0.authorize();
}
parseTokens() {
 return new Promise((resolve, reject) => this.auth0.parseHash((err,
  result) => {
   if (err) {
    reject(err);
   } else {
     resolve({...result, expiresAt: (result.expiresIn * 1000) + new 
     Date().getTime()});
    }
   }
  ));
 }
}