getUser = function getUser() {
    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    return AV.User.currentAsync().then(function (currUser) {
      return currUser || AV.User._fetchUserBySessionToken(options.sessionToken);
    });
  }
Gets the value of an attribute in status data.
@param {String} attr The string name of an attribute.