How do I give Ma.gnolia the missing oauth_token Parameter?

I've been working with Jon Crosby's OAuthConsumer framework for Cocoa to access the Ma.gnolia API. When I get to the Authorizing the Request Token stage, I follow the code example, but Ma.gnolia informs me that I'm missing the oauth_token parameter. Can anyone shed some light on how to pass it in? POST? GET? What does an oauth_token look like?

TIA