You must create an app and share the AppId with the provider so they can authorize your app. This article assumes that you have completed the authorization process.
Go to the App Management page on the API Gateway console and view the created apps.
Click the app name to go to the detail page. You can see the basic information of the app and the most important content, AppKey and Authorized API.
Authorized API shows the APIs that the app is authorized to call. Click Detail for more information.