Since we know that there are two main models called User and Order, as described in the swagger file, it is time to create them for our application. To do that, go to the src folder and create a new folder, called model, like so:

order-api/src/model

In the model folder, create two files—one for each model, called user.ts and order.ts. The user.ts file's content is as follows:

'use strict'

export interface User {
  id: Number
  username: String
  firstName: String
  lastName: String
  email: String
  password: String
  phone: String
  userStatus: Number
}

Now, before we create the Order model, we have to create an enumeration to reflect the OrderStatus options. Create a file called orderStatus.ts in the same folder as the user.ts and order.ts files, with the following content:

'use strict'

export enum OrderStatus {
  Placed = 'PLACED',
  Approved = 'APPROVED',
  Delivered = 'DELIVERED',
}

Then, populate the order.ts file with the following content:

import { OrderStatus } from './orderStatus'

export default interface Order {
  id: Number
  userId: Number
  quantity: Number
  shipDate: Date
  status: OrderStatus
  complete: Boolean
}

Your project structure will look similar to the following: