title: Node js swagger response description
body: <p>i have developed a REST Service using Node Js and Express.
  I have integrate Swagger to define api doc.
  About login service this is the swagger definition that i used:</p>
  
  <pre><code>/**
  * @swagger
  * /api/v1.0/login:
  *   post:
  *     tags:
  *       - Login
  *     description: Login into system
  *     produces:
  *       - application/json
  *     parameters:
  *       - username: User
  *         description: The username of user
  *         in: body
  *         required: true
  *       - password: password
  *         description: Password of user
  *         in: body
  *         required: true
  *
  *     responses:
  *       200:
  *         description: Successfully login
  */
  </code></pre>
  
  <p>But my service gives me this response json:</p>
  
  <pre><code>{
  "status": "ok",
  "data": {
      "auth": true,
      "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjViYzg3ZDFkOWNhNmRkNDM5MDI1YjA1MCIsImlhdCI6MTU0MTA5MzMxMSwiZXhwIjoxNTQxMTc5NzExfQ.3BIl0dIQg-cEU9fyM7BocKLHEugH8cws5_E-dmRVHZM",
      "faId": "HSo7q2o0",
      "roles": "Owner"
  }
  </code></pre>
  
  <p>}</p>
  
  <p>How i can describe this response into swagger response description?
  Thanks</p>