This endpoint allows you to obtain an access token that you can use to initialize Checkout SDK.This access token is only required for the following features using Checkout SDK:
You do not need an access token if using Checkout SDK to service other payment methods or PayPal without PayPal One-Click.A single access token can be used to service the experience to one user and has a lifespan of 15 minutes. You need to provide the UserId of the Natural User or Legal User who will use the Checkout session to make the payment.