When I have got a fault by "Give Cashback to User" API once, after then can I use same "merchantCashbackId" again?
When will the error code INVALID_USER_AUTHORIZATION_ID occur?
How I can check my balance?
When will the payment agree page display to the user?
Is it avaliable for user to use same PayPay MiniApp account on different devices?
Will the UAID change if the user deleted PayPay account and re-registered again with same phone number?
Does recon file include all the error cases?
Can I shorten the user waiting time for payment transition?
Are there zero suppression for pre-auth recon file order_id?
Can I create testing for error cases?