code: func ExportKeysToFile(acs []*Account, fname string) error {
  	f, err := os.Create(fname)
  	if err != nil {
  		return err
  	}
  	defer f.Close()
  	exportAccounts(acs, f)
  	return nil
  }
docs: // ExportKeysToFile will create the named file (or truncate it) and write all the accounts to that file in libotr format.