Enable mail forwarding using a Google Apps Service Account

Question

On April 20, 2015, several Google Apps APIs are being discontinued, including the Provisioning API(gdata).
In my Python scripts, I am using a Service Account and OAuth 2

Answer 1

This should be the proper way to use the credentials object directly:

import gdata.gauth

credentials = SignedJwtAssertionCredentials(serviceEmail,
                                            key, 
                                            sub=adminEmail,
                                            scope=scopes)
client = gdata.apps.emailsettings.client.EmailSettingsClient(domain='mydomain.co')
client.auth_token = gdata.gauth.OAuth2TokenFromCredentials(credentials)
client.UpdateForwarding(username=username, enable=True, 
forward_to=forwardTo, action='ARCHIVE')