Help for Ecommerce Key System

[IPBPowerDev]

Hello,

 

I'm a bit noob with API 😞,but i need it for my commerce. I want, when a customer lunch a my .sh script on his Ubuntu or Debian VPS, it will ask him the product key before start installation.

Can someone help with that with a sample code or something 🙂

 

Regards and thank in advance for your help!