Get the appkey of the App
appkey is the unique identifier of the merchant's APP. When the merchant calls Paynicorn's API, it needs to use the appkey to represent the App.
Merchant console application list page address: https://console.paynicorn.com/#/app/list
Merchant Console > Apps > Apps
Find the corresponding App, click Modify, and go to Basic Information > appkey to get the appkey. The appkey is used to pass it to paynicorn in the API call to uniquely mark a certain App.