AggregateException on GoogleCredential.GetApplicationDefault()

Question

With this code:

private async Task<string> DoCustomToken(string arg)
{
    try
    {
        var uid = "some-uid";
        FirebaseApp.Create(new AppOptions()
        {
            Credential = GoogleCredential.GetApplicationDefault(),//GoogleCredential.FromFile("C:/config-production-firebase.json"),
            ServiceAccountId = "<my-id>@<my-project-id>.iam.gserviceaccount.com",

        }) ;
        string customToken = await FirebaseAuth.DefaultInstance.CreateCustomTokenAsync(uid);
        return customToken;
    }

    catch (Exception e) { return e.GetType().FullName + " - " + e.Message; }

}

I'm getting System.AggregateException: One or more errors occurred at GoogleCredential.GetApplicationDefault()

I'm trying to generate a custom token with C# to be used in a DLL.

PS: When I try with GoogleCredential.FromFile I get a InvalidOperationException: Error deserializing JSON credential data

Enviroment

FirebaseAdmin: 1.9.1

Newtonsoft.Json: 12.0.3

.NET Framework: 4.8

Answer 1

You can look at the InnerExceptions property of the AggregateException class to find more specific causes of your issue. AggregateException objects are thrown when a Task-related exception occurs.