ไม่จำเป็นต้องใช้ useNewUrlParser และ useUnifiedTopology ตั้งแต่ MongoDB Driver รุ่น 4.0.0 ขึ้นไป
https://medium.com/@sanan.nntt/%E0%B9%84%E0%B8%A1%E0%B9%88%E0%B8%88%E0%B8%B3%E0%B9%80%E0%B8%9B%E0%B9%87%E0%B8%99%E0%B8%95%E0%B9%89%E0%B8%AD%E0%B8%87%E0%B9%83%E0%B8%8A%E0%B9%89-usenewurlparser-%E0%B9%81%E0%B8%A5%E0%B8%B0-useunifiedtopology-%E0%B8%95%E0%B8%B1%E0%B9%89%E0%B8%87%E0%B9%81%E0%B8%95%E0%B9%88-mongodb-driver-%E0%B8%A3%E0%B8%B8%E0%B9%88%E0%B8%99-4-0-0-%E0%B8%82%E0%B8%B6%E0%B9%89%E0%B8%99%E0%B9%84%E0%B8%9B-e7f7b071926f