# File lib/omniauth/strategies/yupoo.rb, line 30
      def request_phase
        params = { :api_key => api_key, :perms => options[:scope] }
        params[:api_sig] = yupoo_sign(params)
        query_string = params.collect{ |key,value| "#{key}=#{Rack::Utils.escape(value)}" }.join('&')
        redirect "http://www.yupoo.com/services/auth/?#{query_string}"
      end