Class "PHPMailer\PHPMailer\PHPMailer" not found

I'm using CodeIgniter 4 and I'm trying add PHPMailer to my project via a composer:

composer require phpmailer/phpmailer

My Controller:

PHP Code:

<?php

namespace App\Controllers;

use CodeIgniter\Controller;
use App\Models\IssueModel;
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

class Issues extends Controller {

    public function create() {
        if ($this->request->getMethod() == 'post') {
            .... // some code here
                $issueModel = new IssueModel();

                $mail = new PHPMailer(true);

                $mail->SMTPDebug = SMTP::DEBUG_SERVER;
                $mail->isSMTP();
                $mail->Host      = 'mai';
                $mail->SMTPAuth  = true;
                $mail->Username  = 'noreply';
                $mail->Password  = 'pass';
                $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
                $mail->Port      = 587;

                ..... // some code here
    }

} 


And I have this error:

Class "PHPMailer\PHPMailer\PHPMailer" not found

Where is a problem?