If you want to get a new barcode, go to EN app, and Account Info. Click the top button, More Account Settings. It will open in Safari. In the menu bar on the left side, look for Security Summary. You'll see Two-Step verification is enabled. Click Manage Settings button at the bottom. Just turn on text message verification and then return on Google Authenticator and you'll get a new barcode and you set up Google Authenticator on you iPad or iPhone.