docs: def make_simple():
      """
      Create a L{SimpleAuthenticator} instance using values read from coilmq configuration.
  
      @return: The configured L{SimpleAuthenticator}
      @rtype: L{SimpleAuthenticator}
      @raise ConfigError: If there is a configuration error.
      """
      authfile = config.get('coilmq', 'auth.simple.file')
      if not authfile:
          raise ConfigError('Missing configuration parameter: auth.simple.file')
      sa = SimpleAuthenticator()
      sa.from_configfile(authfile)
      return sa