function testSms() {
var SW_PHONE = '+14242424242';            //
var SW_TO = '+13233233232';               //
var SW_MSG = 'Test SMS on Signalwire';   //
var SW_IMG = '';                         //
                                         //
var SW_PROJ = 'abcdefg-0505-0505-abcdefg';
var SW_TOKEN = '01234567';                       //
var SW_SPACE = 'https://example.signalwire.com/api/laml/2010-04-01/Accounts/' + SW_PROJ + '/Messages.json';                        //

  try {
    UrlFetchApp.fetch(SW_SPACE, {
      method: 'post',
      headers: { Authorization: 'Basic ' + Utilities.base64Encode(SW_TOKEN)},
      payload: {
        To: SW_TO.toString(),
        From: SW_PHONE,
        Body: SW_MSG,
      },
    });
  var status = 'sent: ' + new Date();
  }
  catch (err) {
    return 'error: ' + err;
    Browser.msgBox(err);
  }
}