Hello Mongo team !

It's seems it's impossible to pass index hint using motor asyncio:

```

cursor = mongo.db[self.factory.config.mongo_collection].aggregate(mongo_query).hint({"internal_id": 1, "timestamp": -1})
AttributeError: 'AsyncIOMotorLatentCommandCursor' object has no attribute 'hint'

```

According to the documentation, it should be available....

Thanks in advance,

Regards, Adam.