After you have registered your app for App Check, your app normally won't run in an emulator or from a continuous integration (CI) environment, since those environments don't qualify as valid devices. If you want to run your app in such an environment during development and testing, you can create a debug build of your app that uses the App Check debug provider instead of a real attestation provider.
The debug provider does not currently have a Dart API; you'll need to apply the changes individually for each of your platforms:
- Use App Check with the debug provider on Apple platforms
- Use App Check with the debug provider on Android
- Use App Check with the debug provider in web apps