下面的代码是我的谷歌脚本代码。当我简单地将url粘贴到浏览器上时，它将返回一个值。但是当我尝试使用javascript获取值时。它返回空值
谷歌脚本

function doGet(e) {
  var array = SpreadsheetApp.openById('1qwSU2YVuGea3Dg06yUpUkyhV1Hn-Qf3YshgZkEnJoBo')
  .getSheetByName('Sheet1').getRange('A1:A1').getValues();

  return ContentService.createTextOutput(array[0]);
}

javascript

var url_string = "https://script.googleusercontent.com/macros/echo?user_content_key=1AxKHAUiqHNfdbnLALqbmxIoGLQuLR7qjSR7NxCDxgyqacFzuIovzOSyRyu0xkwpe7TF7qJcKknkuPYhV_apY6L9ikxPUB7em5_BxDlH2jW0nuo2oDemN9CCS2h10ox_1xSncGQajx_ryfhECjZEnMy8zAZf_PeEgqhQVTSu0Ty9Drtp1yaLkXH9-vnTbcP-gooKnCg3eBY8k9BT1tmvR4PZc_4F8_fJkoGWxUlugKqNYjOEVPmtwA&lib=M9OCNb7KeZyOBiWrcHIwQiTdKF1_8u-qf"; 
var url = new URL(url_string);
var c = url.searchParams.get("");
var c = url.
console.log(c);
alert(c);