Is it possible to uniquely identify a user with userAuthorizationId? June 24, 2022 05:48 Updated Yes, it is possible, because a userAuthorizationId is created for each clientId + PayPay user ID. Related articles Can I change my API key and secret? I cannot top up upon payment. No screen to prompt for top up is displayed. How long is the user authorization valid? What is a recon file? Comments 0 comments Please sign in to leave a comment.