protected function execute(InputInterface $input, OutputInterface $output)
{
$app = $this->getApp();
$user = new User($input->getArgument('username'), $input->getArgument('password'));
$users = is_file($app['app.users_file']) ? json_decode(file_get_contents($app['app.users_file']), true) : [];
$users[$input->getArgument('username')] = ['ROLE_USER', $app->encodePassword($user, $input->getArgument('password'))];
file_put_contents($app['app.users_file'], json_encode($users, JSON_PRETTY_PRINT));
$app->log('User added', ['user' => $user->getUsername()], Logger::INFO);
}