Create couponUsage.php

By executing this file, it will return customer information (full name, email address & times of usage) of a specified coupon code.

Usage:
1. Open up the file in source code editor.
2. Find variable "$couponCode", and enter specified coupon code in its value definition.
3. Upload this file to root folder.
4. Execute this file.

Notes:
Output message and format are located in the for loop, around line 33.