How do I use it? Page that describes how to use it mentions some parameters, but there is nothing about how to specify Yahoo ID of user who's using the application or OAuth token that could be used to authenticate request. I'm currently logged in to Yahoo, but when I open it, I get an error saying "Please provide valid credentials. OAuth oauth_problem="unable_to_determine_oauth_type", realm="yahooapis.com"". Am I missing anything?