Chatworkにメッセージを送るGASスクリプト

function myFunction() {
  var WK_ROOM_ID = "(ROOMID)";
  var WK_TOKEN = "(TOKEN)";
  var WK_TEXT = "Chatworkにメッセージを送るGASスクリプト";
  // 送信データ
  var params = {
     headers : {"X-ChatWorkToken" : WK_TOKEN},
     method : "post",
     payload : {
       body : WK_TEXT
     }
   };
  var url = `https://api.chatwork.com/v2/rooms/${WK_ROOM_ID}/messages`;
  UrlFetchApp.fetch(url, params);
}