intridea/omniauth — pull request #674 by beerlington (2013-03-27 03:19:51+00:00)
Title: Adding authenticity token so session will persist

This fixes issue #670
When using the developer login strategy sessions are not being persisted
in Rails 4.0.0.beta1 because the authenticity token is not present when
submitting the form. By adding the CSRF token to the form as a hidden
field, it can be verified, and sessions work properly.