It is necessary to confirm your mail after Login through Google or Facebook, through Devise it is easy to get confirmation link successfully at rails server under development mode.
But how to get confirmation link when it is deployed at Heroku??
Heroku doesnot show any confirmation link even when you check the logs at server. we must use Sendgrid Dyno for this feature.
Under heroku logs you can able to see 401: Unaut...