docs: function() {
        if (!this.isCurrent()) {
          return;
        }
        var authData = this.get('authData');
        if (!authData) {
          return;
        }
        Parse._objectEach(this.get('authData'), function(value, key) {
          if (!authData[key]) {
            delete authData[key];
          }
        });
      }