Hello Lily,

Thank you for the additional information. However, you have not provided sufficient documentation to demonstrate that you are currently authorized by the rights holder to represent the images included in your app.

It would be appropriate to either submit documentation demonstrating this authorization or to remove any third-party imagery or likeness from your app icon and marketing screenshots.

Once you've made the appropriate revisions to your app and its metadata, you can upload your new binary to App Store Connect. We look forward to reviewing your revised and resubmitted app.

Best regards,

App Review

That is the warning I have got from Apple as I have used your API and made an app with that and tried to publish it What document can I Submit to Apple that I have the necessary permission from you?