N APP PURCHASES ( Implementation )
=> Sign In to Unity
=> Open Services Panel
=> Turn On Unity Analytics
=> Turn On In App Purchases
=> Before Importing InApp Package add InApp public Key in the box below it.
=> Create IAP products by going into Windows -> UNITY IAP -> IAP Catalog.
=> Go to button and Add IAP Button component.
=> Change button type to commonly used Purchase.
=> Add PRODUCT ID from dropdown.
=> Add desired event on ON PURCHASE COMPLETE (Product) which will happens when Purchase successful.