This endpoint removes the Pliant web app and mobile app access of the given cardholder and converts the cardholder to an API-only (embedded) cardholder. The cardholder will no longer be able to access the Pliant web app or mobile app, since the login feature is removed for this cardholder. It will also be marked as an API-only (embedded) cardholder. Meaning it needs to be managed via the API. This endpoint is relevant mainly for embedded partnerships where the cardholder is managed by the partner and not Pliant itself. To grant app access again, use the Enable Pliant App Access endpoint.