Callable functions result in {"verifications":{"app":"MISSING","auth":"MISSING"}

Question

When I try to call a function via the flutter SDK, it results in the following error the firebase end.

 {"verifications":{"app":"MISSING","auth":"MISSING"},"logging.googleapis.com/labels":{"firebase-log-type":"callable-request-verification"},"severity":"INFO","message":"Callable request verification passed"}

I am testing on the Firebase Emulator. I do not have the AppCheck plugin installed.The cloud_functions plugin version is 3.2.1

The code for the call is:

final callable = FirebaseFunctions.instance.httpsCallable('create_source');

final resp = await callable.call(accountData);

I am following the setup docs. What am I doing