docs: function(user, permissions, options) {
        if (!permissions || _.isString(permissions)) {
          if (!initialized) {
            throw "You must initialize FacebookUtils before calling link.";
          }
          requestedPermissions = permissions;
          return user._linkWith("facebook", options);
        } else {
          var newOptions = _.clone(options) || {};
          newOptions.authData = permissions;
          return user._linkWith("facebook", newOptions);
        }
      }