Create QR Scan Attendance APP using APP Inventor

Someone asking me on How to Create QR Scan Attendance Record using Smartphone.
this is one example i get from youtube to share with all of you.
credit to the owner : you can look it through this link for details
https://www.youtube.com/watch?v=hynTBp-3toQ
Hope this post minimize your time in searching for examples
 on 

Create QR Scan Attendance APP using APP Inventor | Google AppScript | Google Sheets

All yor need is :1. Apaps inventor account2. Google Apps Script3. Google Sheets
and your smartphone to test it.