code: function(req, requiredParams) {
        // Find all missing parameters
        var missingParams = [];
        _.forEach(requiredParams, function(requiredParam) {
          if (
            Mixins.isNullOrUndefined(req.params && req.params[requiredParam]) &&
            Mixins.isNullOrUndefined(req.query && req.query[requiredParam]) &&
            Mixins.isNullOrUndefined(req.body && req.body[requiredParam])
          ) {
            missingParams.push(requiredParam);
          }
        });
        return missingParams;
      }
docs: Return a list of missing parameters that were required
  
  @param {Object} req
  @param {Array} requiredParams
  @return {Array}