code: function(auth, attributes){
        if(!_.isEqual(auth, attributes)){
          _.merge(auth, attributes);
          return true;
        }
        return false;
      }
docs: Decorates the auth object with values of the attributes object
  where the attributes differ from the auth
  
  @param  {Object} auth       waterline Auth instance
  @param  {Object} attributes used to update auth with
  @return {Boolean}           true if any values were updated