Hi, I'm using a sandbox environment and I'm trying to generate a payment
using an existing token, but am getting a 403 error. I tried the
following things.First, I have generated a REST Shared Secret key, and
using both HTTP Signature as well as a p1...
For anyone following this thread, I have emailed their developer support
using this form
https://developer.cybersource.com/support/contact-us.html and will post
a follow-up presuming something useful comes back from them.