I am trying to access game state from Google server of a Facebook friend. I fetch the List of Facebook friends from Facebook SDK and get a Facebook-id of a friend in return. Game state is present on Google server against Google-id. How can I form a mapping between these two? I want to achieve this without involving any other server.
To dTo get this right you need involving other server. Although you can do is create a list in a local file, with the relation google user - Id facebook