Meaning of accId

accId is the PingPong merchant shop number, serving as the unique identifier for merchant shops in PingPongCheckout

How to Obtain accId

You need to complete PingPong merchant registration before you can obtain it. You can refer to the registration process. Users who have already completed registration can directly log in to the merchant backend to obtain it. The location for obtaining it is shown in the screenshot below:

Next pageAuthorization