SMTP Error: Could not authenticate using PHPMailer and Gmail account - php

Question

I am trying to send an email using PHPMailer and from my gmail account. But it shows
SMTP ERROR: Password command failed: 535-5.7.8 Username and Password
not accepted. Learn more at535 5.7.8
https://support.google.com/mail/?p=BadCredentials
5-20020aca0605000000b0037d8d231f8csm951314oig.51 - gsmtp SMTP Error:
Could not authenticate.
Unfortunately, the option to use "less secure apps" has been turned off by Google, so that option is not available to me. What are some other options I can try to resolve this issue?
Here is my current script:
<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
require 'vendor/autoload.php';
$mail = new PHPMailer(true);
try {
//Server settings
$mail->SMTPDebug = 2; // Enable verbose debug output
$mail->isSMTP(); // Send using SMTP
$mail->Host = 'smtp.gmail.com'; // Set the SMTP server to send through
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'lsurahman157#gmail.com'; // SMTP username
$mail->Password = 'mypasswodis!'; // SMTP password
$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; // Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` also accepted
$mail->Port = 587; // TCP port to connect to
//Recipients
$mail->setFrom('lsurahman157#gmail.com', 'Full Name');
$mail->addAddress('aonik1#lsu.edu', 'Abdur Rahman Onik'); // Add a recipient
// Content
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Subject Text';
$mail->Body = '<i>Mail body in HTML</i>';
$mail->AltBody = 'This is the plain text version of the email content';
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) {
echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

Answer 1

If you activate MFA for your account, you are able to define App-Passwords. You can use the passwords for SMTP an IMAP authentication.