code: function(userId, params, callback) {
        if (!userId) return callback(new Error(utils.i18n.conversations.userId));
        utils.debug('Conversation getAllFromUser: ' + userId);
  
        var queryParams = '';
        if (typeof params === 'function') callback = params;
        else queryParams = '?' + querystring.stringify(params);
  
        request.get({
          path: '/users/' + querystring.escape(userId) + '/conversations' + queryParams
        }, callback);
      }
docs: Retrieve all conversations from user
  
  @param  {String}   userId      User ID
  @param  {String}   [params]    Query parameters
  @param  {Function} callback    Callback function