Hi Tiago,
The Google Request Token is the token used for authorizations with the Google Web APIs. I dont believe you cant use the Web API as you expect. As far as I know the OAuth is as follows with regards to the Google APIs:
- Make a request to the Identity API for the Specific user you wish to create a Request Token.
- When you make a request to the Google Web API, you attach your Request Token to the Request as follows :
- xhr.setRequestHeader("Authorization", "Bearer " + googleToken);
If I understand your question correctly, I don't think the REST Mashup will provide you a working solution. Maybe a Javascript/Java solution that users the Google Libraries and pushes/pulls form C4C might be a better solution.