Determine current user in Apps Script

Question

I\'m trying to identify current user\'s name to make notes of who edited what like this:

  r.setComment(\"Edit at \" + (new Date()) + \" by \" + Session.getA         


        

Answer 1

In this code you can use a cell for input. Authorising scripts are not required.

function onEdit(e){
  checkUsername(e);
}

function checkUsername(e){
  var sheet = e.source.getActiveSheet();
  var sheetToCheck = 'Your profile';
  var sheetName = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetToCheck);
  var CellInputUsername = 'B4';
  var ActiveCell = SpreadsheetApp.getActive().getActiveRange().getA1Notation();

  if (sheet.getName() !== sheetToCheck || ActiveCell !== CellInputUsername){return;}

  var cellInput = sheetName.getRange(CellInputUsername).getValue();
  PropertiesService.getUserProperties().setProperty("Name", cellInput);

  // Make cell empty again for new user
  sheetName.getRange(CellInputUsername).setValue("");

  var Username = PropertiesService.getUserProperties().getProperty("Name");      
  SpreadsheetApp.getUi().alert("Hello " + Username);
}