Mongo DB: Buffer() is deprecated bug

Thank you, yes I saw all of that, but even with the code below I’m getting the error.

export async function addRecord(db_name,collection_name,record) {
 const MongoClient = require('mongodb').MongoClient;
 const uri = "mongodb+srv://...";
 const client = MongoClient(uri, {useNewUrlParser: true, useUnifiedTopology: true});
 await client.connect(err => {
 const collection = client.db(db_name).collection(collection_name);
 let doc = record;
        collection.insertOne(doc, async function (error, response) {
 let data = await response.ops[0];
            console.log(data)
        });
        client.close();
    });
}

Unsure what I’m missing here.