code: function url(httpRequest, httpResponse) {
          var response = new Response(httpResponse);
  
          grasshopper.googleAuthUrl()
              .then(function(url) {
                  response.writeSuccess(url);
              })
              .fail(function(message) {
                  var err = {
                      code : 400,
                      message : message
                  };
  
                  response.writeError(err);
              })
              .done();
      }
docs: Method will return a google auth url.