Mongodb NodeJS Driver

main.js

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

(async function() {
  const newDbName = "my-new-db";
  const newDbUser = "test";
  const newDbPwd = "test";
  const newCollection = "my-new-collection";

  // ? Create a new user for a new database
  console.time("CreateNewUser");
  {
    const url = "mongodb://admin:admin@localhost:27017/admin";
    const client = await new MongoClient(url, {
      useUnifiedTopology: true
    }).connect();
    await client
      .db()
      .admin()
      .addUser(newDbUser, newDbPwd, {
        roles: [
          { role: "dbAdmin", db: newDbName },
          { role: "readWrite", db: newDbName }
        ]
      });

    await client.close();
  }
  console.timeEnd("CreateNewUser");

  // ? Connect to the new database & collections
  console.time("CreateNewCollection");
  {
    console.log("HERE");
    const url = `mongodb://${newDbUser}:${newDbPwd}@localhost:27017/admin`;
    const client = await new MongoClient(url, {
      useUnifiedTopology: true
    }).connect();
    mongoClient = client;

    await client.db(newDbName).createCollection(newCollection, {
      capped: true,
      size: 1024
    });

    // await client.db(newDbName).dropDatabase();
    await client.close();
  }
  console.timeEnd("CreateNewCollection");

  console.time("InsertDocs");
  // ? Connect to the new database
  {
    console.log("HERE");
    const url = `mongodb://${newDbUser}:${newDbPwd}@localhost:27017/admin`;
    const client = await new MongoClient(url, {
      useUnifiedTopology: true
    }).connect();
    mongoClient = client;

    await client
      .db(newDbName)
      .collection(newCollection)
      .insertMany([{ email: "myemail@email.com" }]);

    // await client.db(newDbName).dropDatabase();
    await client.close();
  }
  console.timeEnd("InsertDocs");
})();