google contacts api service account oauth2.0 sub user
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Published on 2014-06-11T21:21:28Z
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I am trying to use the Google Contacts API to connect to a user's contact information, on my Google apps domain.
Generating an access_token using the gdata api's ContactsService clientlogin function while using the API key for my project works fine, but I would prefer to not store the user's credentials, and from the information I have found that method uses OAuth1.0
So, to use OAuth2.0 I have:
- Generated a Service Account in the developer's console for my project
- Granted access to the service account for the scope of https://www.google.com/m8/feeds/ in the Google apps domain admin panel
Attempted to generate credentials using SignedJwtAssertionCredentials:
credentials = SignedJwtAssertionCredentials( service_account_name=service_account_email, private_key=key_from_p12_file, scope='https://www.google.com/m8/feeds/', sub=user_email')
The problem I am running into is that attempting to generate an access token using this method fails. It succeeds in generating the token when I remove the sub parameter, but then that token fails when I try to fetch the user's contacts.
Does anyone know why this might be happening?
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