//YOUR DATABASE WITH A SAMPLE RECORD
mongoose
  .connect(config.DB_CONNECTION, {
    useUnifiedTopology: true,
    useNewUrlParser: true
  })
  .then(() => console.log("Connected to your MongoDB."))
  .catch(err => {
    console.log("Failed to connected to DB Error: "+ err.message);
  });

  let createServiceObj = null;
  createServiceObj = createService.getInstance();
  createServiceObj.createSampleUser();