code: func (cfg *Config) DebugDumpToYAML() string {
  	shallow := *cfg
  	// do not copy sensitive data to stdout
  	shallow.Identities = nil
  	shallow.Auth.Authorities = nil
  	out, err := yaml.Marshal(shallow)
  	if err != nil {
  		return err.Error()
  	}
  	return string(out)
  }
docs: // DebugDumpToYAML is useful for debugging: it dumps the Config structure into
  // a string