Applying Google OAuth Verification

Get verification html file of your project from Google Search Console

1. Add a property of your project (Insert the project url)
2. Click “Verify this property”

Upload the file to your project

The html file should be able to visit on “<your_app_url>/<html_file_name.html>” (e.g. http://moonbear.herokuapp.com/googlea1597013a70c6f23.html)

Note. In Heroku, static file path should be enabled: add the code into config.ru

use Rack::Static, 
      :urls => ['/googlea1597013a70c6f23.html'], 
      :root => 'public'

put the file in /public folder

Create a privacy policy page(link)

1. Your Privacy policy must be visible to users, hosted within the domain of your website.
2. Your privacy policy and in-product privacy notifications must thoroughly disclose the manner in which your application accesses, uses, stores, or shares Google user data.

Summit the verification apply

on Google Cloud Console - Oauth consent screen(https://console.cloud.google.com/apis/credentials/consent)

Wait for Google’s reply

It takes few days (about 5 days)

Note Once the url changed(home & privacy page) or the html file removed, you’ll lose verification, which means you’ll need to go through the process again.