response header and body not visible even after adding the response body

screen-capture (16).zip
I and getting a response from API either for success or for failure but swagger doesn't even show the response header and response body. I am using the swagger-ui-express npm package inside the express project and here is my config file for swagger.

/**
 * @swagger
 * /sign-up:
 *   post:
 *     summary: Create a JSONPlaceholder user.
 *     requestBody:
 *       required: true
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               firstName:
 *                 type: string
 *                 description: The user's name.
 *                 example: Leanne Graham
 *               lastName:
 *                 type: string
 *                 description: user last name
 *                 example: kumar
 *               email:
 *                 type: email
 *                 description: user email
 *                 example: kumar@bal.com
 *               countryCode:
 *                 type: string
 *                 description: user country code
 *                 example: +1
 *               phoneNumber:
 *                 type: number
 *                 description: user phone number
 *                 example: 9867858558
 *               password:
 *                 type: string
 *                 description: user password
 *                 example: 5fghfhfg7hgh
 *               userType:
 *                 type: string
 *                 description: android/ios
 *                 example: android 
 *   responses:
 *     '200':
 *      description: "A success object"
 *      content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               data:
 *                 type: string
 *                 description: userid
 *               status:
 *                 type: boolean
 *                 description: true
 *               message:
 *                 type: string
 *                 description: sign up successfully
 *     '400':
 *      description: "Error"
 *     '201':
 *      description: "Created"
 *       
*/

Start with the supplied Swagger configuration and screen capture, then reproduce the missing response header and body in the swagger-ui-express setup. No repository file or test is named; done means identifying the cause and confirming that successful and failed API responses display their headers and bodies.