lib/oauth.js
function passportTokenCallback(provider, options) {
    return function(req, res, next) {
      var theOptions = extend({}, options);
      theOptions.session = false;
      passport.authenticate(provider + '-token', theOptions)(req, res, next);
    };
  }
function passportTokenCallback(provider, options) {
    return function(req, res, next) {
      var theOptions = extend({}, options);
      theOptions.session = false;
      passport.authenticate(provider + '-token', theOptions)(req, res, next);
    };
  }
Configures the passport.authenticate for the given access_token provider, passing in options