[cloud_functions] How to get Firebase Functions error Object ?

[LeonanFragaLeonardo]

Hi everyone,

Context:

My question concerns about how to handle with API error response when using cloud_functions to perform FirebaseFunctions calls.
I'm using cloud_functions v3.0.3 to make some Http requests via Firebase Http Functions.

Usage:

My requests are made by using the following code:

final HttpsCallable callable = firebaseFunctions.httpsCallable(
        'authenticateWithAD',
        options: HttpsCallableOptions(
          timeout: const Duration(
            seconds: 20,
          ),
        ),
      );

      final result = await callable
          .call({"username": user.userName, "password": user.password});
      ....

Everything works fine when response is 2xx. (I didn't test with 1xx or 3xx)

But:

When my API returns an error (4xx or 5xx), I can't get the error object.
The FirebaseFunctionsException gives me an object like this:

code: "internal"
details: null
message: "INTERNAL"
plugin: "firebase_functions"
strackTrace: #0       StandardMethodChanne...
hashCode: 
runtimeType: Type...

As we can see, there is no property that I can use to get the error from my API.

My API returns this:

{
  "statusCode":401,
  "name":"InvalidCredentialsError",
  "code":"AUTH_0002",
  "message":"Invalid username or password"
}

Main Question

Is there an way to get the API error response by using callable.call returns from FirebaseFunctionsException ?