Symfony - Retrieve current user from in a command file

I'am currently working on a very old Symfony 2.4 project.

I have created a CsvImportCommand file to create adding massive customers with a csv functionality.

I need to set the current logged-in user as the value of my column 'created_by', but i do not know how can i get this information.

I saw that i could get this information in the twig template with app.user or with get('security.context')->getToken()->getUser() in a controller file.

But i really do not know how can i retrieve this information in a command file.

Remember, it is a Symfony 2.4 project.

below are my codes, it returns an error : PHP Parse error: syntax error, unexpected '$this' (T_VARIABLE) (on my 2nd line)

class CsvImportCommand extends ContainerAwareCommand

{

private $user = $this->get('security.context')->getToken()->getUser();
private $username = $user->getUsername();

protected function configure()
{
    $this
        ->setName('csv:import')
        ->setDescription('Import users from CSV file')
    ;
}

protected function execute(InputInterface $input, OutputInterface $output)
{
    $now = new \DateTime();
    $output->writeln('<comment>Start:' . $now->format('d-m-Y G:i:s') . '---</comment>');

    $this->import($input, $output);

    $now = new \DateTime();
    $output->writeln('<comment>End:' . $now->format('d-m-Y G:i:s') . '---</comment>');
}

protected function import(InputInterface $input, Outputinterface $output)
{
    $data = $this->get($input, $output);

    $em = $this->getContainer()->get('doctrine')->getManager();

    $em->getConnection()->getConfiguration()->setSQLLogger(null);

    $size = count($data);
    $batchSize = 20;
    $i = 1;

    foreach($data as $row) {
        $person = $em->getRepository('MyBundle:Person')->findOneBy(array('firstname'=>$row['firstname'], 'lastname'=>$row['lastname']));

        if(!$person){
            $person = new Person();
            $em->persist($person);
        }
        $person->setIsPrivate($row['is_private']);
        $person->setCivility($row['civility']);
        $person->setFirstName($row['firstname']);
        $person->setLastName($row['lastname']);
        $person->setPhoneHome($row['phone_home']);
        $person->setMobileHome($row['mobile_home']);
        $person->setEmailPro($row['email_pro']);
        $person->setEmailHome($row['email_home']);
        $person->setCreatedAt(new \DateTime());
        $person->setUpdatedAt(new \DateTime());
        $person->setCreatedBy($username);

        if (($i % $batchSize) === 0) {
            $em->flush();
            $em->clear();

            $now = new \DateTime();
            $output->writeln('of users imported... | ' . $now->format('d-m-Y G:i:s'));
        }

        $i++;
    }

    $em->flush();
    $em->clear();
}

Thanks in advance for your answers,

source https://stackoverflow.com/questions/67892947/symfony-retrieve-current-user-from-in-a-command-file