code: function lambdaError(fn, settings){
      var log = (settings && settings.log === false ? false : true);
      var map = (settings && settings.map ? settings.map : undefined);
      var exclude = (settings && settings.exclude ? settings.exclude : undefined);
      
      return (event, context, callback) => {
          fn(event, context, (err, result) => {
              if(err){
                  if(log){
                      console.error(Errors.stack(err));
                  }
                  
                  if(typeof err !== 'object'){
                      console.error('Error must be an object:', err);
                      err = new InvalidErrorValue(err);
                  }
                  
                  return callback(Errors.json(err, false, map, exclude));
              }
              
              return callback(null, result);
          });
      };
  }
docs: Wrap all API Gateway lambda handlers with this function.
  @param {Function} fn - AWS lambda handler function to wrap.
  @param {Object} setting -
  @param {boolean} setting.log - Whether or not to log errors to console.
  @returns {Function}