Connecting with MongoDB native driver
-------------------------------------

I wrote following code to connect mongodb through native driver which has been install with `npm install mongodb --save`

```
const MongoClient = require("mongodb").MongoClient;
const url = "mongodb://127.0.0.1:27017";

const dbName = "game-of-thrones";
let db;

MongoClient.connect(
url,
 { useNewUrlParser: true },
  (err, client) => {
    if (err) return console.log(err);

  db = client.db(dbName);
   console.log(`Connected MongoDB: ${url}`);
   console.log(`Database: ${dbName}`);
  }
);

```

When I write on the terminal `node server.js` I got following error 

> 
> (node:3500) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to MongoClient.connect.
>  Connected MongoDB: mongodb://127.0.0.1:27017
>  Database: game-of-thrones
> 
> 
> 

The database is connected, but how can I get rid out from the warning