Create MongoDB queries to insert a document into a collection and to find a document in a collection

nosql.js

const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017/test';

mongoClient.connect(url, function(err, db) {
  if (err) {
    throw err;
    console.log('ERROR - Unable to connect to database.')
  }
  console.log('INFO - Database connected.');

  db.createCollection('users', function(err, collection) {
    if (err) {
      throw err;
      console.log('ERROR - Unable to create collection');
    }
    console.log('INFO - Collection created.');

    let data = {
      name: 'Francis Ngo',
      password: 'password123',
      admin: true
    };

    collection.insert(data, function(err, docs) {
      if (err) {
        throw err;
        console.log('ERROR - Unable to insert data.');
      }
      console.log('INFO - Document inserted.');

      collection.count(function(err, count) {
        if (err) {
          throw err;
          console.log('ERROR - Unable to count documents');
        }
        console.log('INFO - The collection contains ' + count + ' documents.');
      });

      collection.find().toArray(function(err, documents) {
        if (err) {
          throw err;
          console.log('ERROR - Unable to find document.');
        }
        documents.forEach(function(document) {
          console.log('INFO - Found a document with name: ' + document.name);
        });

        db.close();
        console.log('INFO - Database connection closed.')
      });
    });
  });
});