A warden strategy that provides oauth authentication to github. Find out more about enabling your application at github's oauth quickstart.
To test it out on localhost set your callback url to 'http://localhost:9292/auth/github/callback'
There's an example app in spec/app.rb.
% gem install bundler
% bundle install
% GITHUB_CLIENT_ID="<from GH>" GITHUB_CLIENT_SECRET="<from GH>" bundle exec rackup -p9393 -E none