When setting up Worldpay (VAP) in the dashboard you will need to configure
the following credentials.
Username & Password: The Worldpay (VAP) username and password
can be shared with you by your Worldpay Account manager.
Merchant ID: Your merchant ID can likewise be shared with you by your Worldpay Account manager.
Default Report Group: This value will be use as the default “Report Group” for every Worldpay (VAP)
API request. See the Worldpay (VAP) docs
for more information on how the Report Groups work. We will be looking to allow for overriding this identifier
for processing requests in the near future.