authentication#create method for pernataleiovorrei.com (buggy version)

gistfile1.rb

def create
  omniauth = request.env["omniauth.auth"]
  authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid'])
  if authentication
    sign_in_and_redirect(:user, authentication.user)
  else
    current_user.authentications.create(:provider=>omniauth['provider'], :uid=>omniauth['uid'])
    flash[:notice] = "You rock man"
    redirect_to authentications_url
  end
end