How services are loaded before and after

serviceDependencies.js

// Contructor based DI (intermediary solution we had before)
const UserService = require('../user/userService')
const userService = new UserService(crmService, lhNotifier, userPropertyService)
// Note: All of the required services had to be managed in each occurrence
// Consistency was not the only pain we had

// With DI container in place
const { container, types } = require('../dependencyContainer')
const userService = container.get(types.UserService)