Simple password ServiceNow API authentication in Google script.

SNOWsimpleAuth.gs

function SNOWsimpleAuth() {

 // Those are environnement variables defined in File>Project properties>Script properties
 var username = PropertiesService.getScriptProperties().getProperty('LOGIN');
 var password = PropertiesService.getScriptProperties().getProperty('PASSWORD');
  
 // I will use Google script UrlFetchApp class to make request, which is more powerfull than XMLHttpRequest
  var headers = {
    'Authorization': 'Basic ' + Utilities.base64Encode(username + ":" + password)
  };
  
   var options = { 
   'method' : 'get',
   'accept': 'application/json',
   'headers':headers 
  };
  
  
  try{
  // Let's query the first incident of a SNOW testing developper instance
  var response = UrlFetchApp.fetch("https://devXXXXX.service-now.com/api/now/table/incident?sysparm_limit=1", options);
  }catch(e){
    Logger.log("caught this:" + e);
  }

  Logger.log("Before JSON parsed "+ response.getContentText());
  
  var responseBody = JSON.parse(response.getContentText())['result'];
  
  Logger.log(responseBody.result);
  
}