How to do Google Billing(IAP) in Cocos Creater 3.4.2 or 3.4.2+ versions without SDKBOX

Cocos Creator
#1

How to do Google Billing(IAP) in Cocos Creater 3.4.2 or 3.4.2+ versions through Android Studio

#2

look GitHub - android/play-billing-samples: Samples for Google Play In-app Billing