/*
   * Set the authentication method string corresponding to the given
   * auth method id
   *
   * Value must be one of:
   * * Openwsman::NO_AUTH
   * * Openwsman::BASIC_AUTH
   * * Openwsman::DIGEST_AUTH
   * * Openwsman::PASS_AUTH
   * * Openwsman::NTLM_AUTH
   * * Openwsman::GSSNEGOTIATE_AUTH
   *
   * call-seq:
   *   transport.auth_name(Integer) -> String
   *
   */
  static const char *auth_name(int auth) {