google apps script to write spreadsheet

spreadsheet_write_test.gs

function writeSheet(e) {
  var ss = openSheet();
  ss.appendRow([e]);
}

function doGet() {
  const htmlOutput = HtmlService.createTemplateFromFile('ss_open_test').evaluate();
  htmlOutput.setTitle("スプレッドシート書き込みテスト");
  return htmlOutput;
}

function openSheet() {
  var id = "1lDnkZwZxwB0DCN5FtKQJvE44y-LIu9_vsviz9Yn-j7s";
  var ss = SpreadsheetApp.openById(id).getSheetByName("messages");
  return ss;
}