def _validate_version(request)
      unless self.class.versions.include?(request.version)
        _error!(Errors::NotFoundError, request.version)
      end
    end
def _validate_version(request)
      unless self.class.versions.include?(request.version)
        _error!(Errors::NotFoundError, request.version)
      end
    end
Validates that the version of the request matches a defined version module.
 If the version is not found, it throws a NotFoundError (HTTP 404).