Google URL Shortener API - 入门

Question

我正在尝试在Script.google.com中运行Google的API示例here中的示例。

示例代码：

function getClicks(shortUrl) {
  var url = UrlShortener.Url.get(shortUrl, {
    projection: 'ANALYTICS_CLICKS'
  });
  Logger.log('The URL received %s clicks this week.', url.analytics.week.shortUrlClicks);
}

错误：

Required parameter: shortUrl (line 2, file "Code")

我错过了什么？