I can connect to mongodb with:

```
const client = await MongoClient.connect('mongodb://user:pass@host/mydb', {
    useNewUrlParser: true
})

```

Then in order to perform queries I have to use a `db` object. I can get it via:

```
const db = await client.db('mydb')

```

It seems redundant, because I have to give the database name twice. Can I avoid the second step? (assuming I can't change the URL given to the connect function)