finish (Rack::Auth::OpenID)

    # File lib/rack/auth/openid.rb, line 287
          def finish(consumer, session, req)
            oid = consumer.complete(req.GET, req.url)
            req.env['rack.auth.openid.response'] = oid
            req.env['rack.errors'].puts(oid.message)
            p oid if $DEBUG

            raise unless ValidStatus.include?(oid.status)
            __send__(oid.status, oid, req, session)
          end