code: function HttpError(message, options) {
      // handle constructor call without 'new'
      if (!(this instanceof HttpError)) {
          return new HttpError(message, options);
      }
  
      HttpError.super_.call(this);
      Error.captureStackTrace(this, this.constructor);
      this.name = 'HttpError';
      this.message = message;
      this.status = 500;
  
      options = options || {};
      if (options.code)     { this.code = options.code; }
      if (options.errors)   { this.errors = options.errors; }
      if (options.headers)  { this.headers = options.headers; }
      if (options.cause)    { this.cause = options.cause; }
  }
docs: All HTTP Errors will extend from this object