docs: function(params, callback) {
          /**
           * Callback for QB.users.create(params, callback)
           * @callback createUserCallback
           * @param {object} error - The error object
           * @param {object} response - The user object
           */
          this.service.ajax({url: Utils.getUrl(config.urls.users), type: 'POST', data: {user: params}},
              function(err, res) {
                  if (err) {
                      callback(err, null);
                  } else {
                      callback(null, res.user);
                  }
              });
      }