code: func (l *AuditLog) auditDirs() ([]string, error) {
  	authServers, err := l.getAuthServers()
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  
  	var out []string
  	for _, serverID := range authServers {
  		out = append(out, filepath.Join(l.DataDir, serverID))
  	}
  	return out, nil
  }
docs: // auditDirs returns directories used for audit log storage