gmail smtp settings to PhpMailer

<?php
/*
 * Tested PhpMailer v6.0.7
 */
use PHPMailer\PHPMailer\PHPMailer;

require 'vendor/autoload.php';

$mail = new PHPMailer();
$mail->SMTPOptions = array(
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    )
);

$mail->IsSMTP();
$mail->Host = "smtp.gmail.com";
$mail->Port = 587;
$mail->SMTPSecure = 'tls';
$mail->SMTPAuth = true;

$mail->Username = "@gmail.com";
$mail->Password = "";

$mail->SetFrom("@gmail.com");
$mail->addAddress("@");

$mail->IsHTML(false);
$mail->Subject = "Subject";
$mail->Body = "Message";

 if(!$mail->Send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;
 } else {
    echo "Message has been sent";
 }
?>