How to make FirebaseFunctions.instance.httpsCallable() pass Authorization header

[jdeltoft]

I'm struggling with getting the user id token included in the call to httpsCallable(). I call it like this from flutter:

Future<bool> cfCreateAccount(String name, address, email, phoneNumber, password, randomSalt, {int? parentId}) async {
  HttpsCallable callable = FirebaseFunctions.instance.httpsCallable('createAccount', options: HttpsCallableOptions(timeout: Duration(seconds: 10)));
  try {
    var param = {'name': name, 'address': address, 'email': email, 'phone_number': phoneNumber, 'password': password, 'random_salt': randomSalt};
    final HttpsCallableResult result = await callable.call(param);
    if (result.data['response'] == 'Pass') {
      return true;
    }
  } catch (e) {
    print("Failed Cloud Function Call: $e");
  }
  return false;
}

This person was asking I think a similar question but for them they said the answer was Authorization was automatically included:

https://stackoverflow.com/questions/61515389/how-to-add-headers-to-firebase-httpscallable

I've signed in with this:

auth.signInWithEmailAndPassword(email: user, password: password);

and afterwards I can call user.getIdToken() and it shows what looks like my auth id. But every way I try to check seems to indicate that the auth header isn't in the request to the cloud function.

I wrote the cloud function in python. It looks like this:

def createAccount(request):
    request_json = request.get_json(silent=True)
    request_args = request.args
    sql = None
    conn = None
    res = dict()

    res['data'] = str(request.authorization)
    return json.dumps(res)

But this returns "None". Is there some issue maybe with how I call httpsCallable() in flutter? I'm not sure how it knows to get the auth id.