[HELP] How correctly use exports for object in JS?

Hey. I’m trying to run the following code:

const mongoDB = require("mongodb").MongoClient;

exports("createDbClient", () => {
    return new mongoDB("mongodb://localhost:27017", { useNewUrlParser: true });
});

const client = exports.foggy_db_api.createDbClient();

client.connect((err) => {
    if(!err){
        console.log("Connected to DB");
    }
    else{
        console.log(err);
    }
});

But I get an error: Error loading script server/main.js in resource foggy_db_api: TypeError: client.connect is not a function
stack: TypeError: client.connect is not a function at server/main.js:19:8

What am i doing wrong?