Programmatically Revoke OAuth token for google account

So here at the end of the page says a way to be able to revoke this token via the AuthSub api (the old api).

I manage the whole authentication system with the new api OAuth and when I try to revoke the token with the authsub steps its just sending me an “HTTP Error 403: Invalid AuthSub token.”

Here is my code in python:

req = urllib2.Request("https://www.google.com/accounts/AuthSubRevokeToken",headers=
      {'Authorization':'AuthSub token="mysuperloluselesstoken"'})
urllib2.open(req)

Is there an easier way to do this? Should I do something with the secret_token + user_token + consumer?

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