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    Prerequisites
    Before using the extension, ensure that you have done these prerequisites:
- A Visa Acceptance Solutions account withUnified Checkoutenabled.
 - Payer Authentication direct connection if3-D Secureis required.
 - A Token Management Service if you allow customers to save their payment cards on your website.
 
Contact support or your reseller if any of these prerequisites
                are not completed.
If you do not yet have a Visa Acceptance Solutions account, you can create one
                    here. Demo accounts are created with
                United States dollars as the default currency.
Refer to this article on how to create REST API keys in
                the 
Business Center
.