I\'m using devise 2.0 and gem omniauth-twitter
The problem is that twitter does not send an email in response, so the model user of my application validates that the
I am facing the same problem, Twitter doesn't give you the email via oauth, you have to think in another way to obtain the email. The only solution that I figured out, is override the callback and use the twitter data to autocomplete a form and give the user the chance to complete his mail by himself and then sign up and save the user in the database.
Look the following question:
Is there a way to get an user's email ID after verifying his/her Twitter identity using OAuth?