Changing the sender's email address - email

Question

Ive created below script to automatically send emails when the checkbox is ticked. My problem is, the sheet is being used by two users and I want to change the sender so that the email will be sent out from the user who triggered the script.
I've tried adjusting the "Deployment" settings so that the app script runs as the "User accessing the Web app", also asked the other user to create a trigger of his own, which is working fine. But we are getting two emails (probably because of the two triggers?) Looking for advice on how do I go about it.
function onCheckboxEdit(e) {
var source = e.source;
var sheet = source.getActiveSheet() ;
var range = e.range;
var row = range.getRow();
var column = range.getColumn();
console.log("column:: ", column);
var targetRange = sheet.getRange(row, 13, 1, 7);
var targetValues = targetRange.getValues();
console.log("targetRange:: ", targetValues);
var recipient = targetValues[0][2];
var checkboxValue = targetValues[0][4];
var body = targetValues[0][1];
var Replacement = targetValues [0][0];
var subject = "Replacement for " + Replacement;
var ccmail = targetValues[0][3];
var Rname = targetValues[0][5];
var EMAIL_SENT = 'E-mail sent';
var emailDupe = targetValues[0][6];
if(emailDupe !== 'E-mail sent' && checkboxValue == true) {
console.log("checkbox marked true")
GmailApp.sendEmail(recipient, subject, body, {cc:ccmail,
name: Rname})
sheet.getRange(row, 19).setValue(EMAIL_SENT)
}else if (column = 17 && checkboxValue == false) {
console.log("checkbox marked false")
}else {
console.log("No clue")
}
}

Answer 1

In the case of Google workspace domain, you may be able to get the email of the effective user and the active user and compare it to stop double triggers.
function onCheckboxEdit(e) {
const eUser/*User who owns the trigger*/ = Session.getEffectiveUser().getEmail();
const aUser/*current user at the keyboard*/ = Session.getActiveUser().getEmail();
console.log({time: new Date(), aUser, eUser});
if (aUser !== eUser) return;
/*rest of the code*/
var source = e.source;
/*...*/
}
Check the logs for actual logged value and change the if statements accordingly.