Exchange your clientId and clientSecret for a clientToken that can be be used in frontend code. clientToken will be unusable after the expiresAt time, which will normally be after 30 min.
To try the request in the mock server on the right, substitute username for clientId and password for clientSecre
Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
Unique ID for an order
Time, in seconds, after which this Order will expire
x <= 3600A unique ID that represents a user or customer. This can be used if you wish to track orders on a per customer basis
Which contains rates for countries/regions in ISO3166-2 format.
If fields here are passed, they will be pre filled in the Checkout