Google Script URL Fetch with Credentials for Persistent URLs

fetchMethod.gs

function fetchMethod()
{
  var options = {};
  // This code uses a "headers" option in order to pass in credentials
    options.headers = {"Authorization": "Basic " + Utilities.base64Encode(username + ":" + password)};
  // The code below logs the output of the following Persistent URL.
  var response = UrlFetchApp.fetch("https://www.doba.com/retailer-export/get/type/product/tag/*", options);
  Logger.log(response.getContentText()); //Log the download in the Google Script Logger
  DriveApp.createFile("file_name_of_your_choice", response); //Download the file to Google Drive.
}