Ionic Pro Build Service iOS URL SCHEME

How do i configure the build service in Ionic Pro for iOS so i can customize the URL_SCHEMES (PRODUCT_BUNDLE_IDENTIFIER)

The problem I have right now is the App Store builds are being failed by App Loader complaining about an invalid url scheme when using the cordova plugin Braintree.

After some extra digging, we aren’t sure if this is an issue with the build service (fastlane) or cordova-plugin-braintree. Either way we need to set the PRODUCT_BUNDLE_IDENTIFIER so braintree plugin can pick it up.

Any ideas: