How to login to Google API with Service Account in C# - Invalid Credentials

Question

I\'m beating myself bloody trying to get a simple service acccount login to work in C#, to Google API and Google Analytics. My company is already getting data into Analytics, an

Answer 1

The invalid credentials error is happening because the scopes you specified aren't actually getting sent with your credentials. I made the same mistake and only realized after I debugged and still saw 0 scopes on the credential after the CreateScoped call.

A GoogleCredential is immutable so CreateScoped creates a new instance with the specified scopes set.

Reassign your credentials variable with the scoped result like so and it should work:

  if (_cred.IsCreateScopedRequired) {
    _cred = _cred.CreateScoped(AnalyticsService.Scope.Analytics);
  }

The accepted answer works because it's achieving the same thing in a more difficult way.