It appears that the link you provided is not from our Visa Developer Portal website, hence, we won't be able to support you with that. If I've misunderstood, and you are a developer looking to build a solution for your customers, please visit this link to "Get Started" and find an API that meets your use case. https://developer.visa.com/pages/working-with-visa-apis
Also, please let us know the Visa Developer Portal API that you are interested in using for your project and someone will be happy to help answer any questions you have.
Please see our website links below for specific APIs relevant to your business case.
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