Example Symfony 5 maker command to create a user entity from command line.

AddUser.php

<?php

declare(strict_types=1);

namespace App\Maker;

use Symfony\Bundle\MakerBundle\ConsoleStyle;
use Symfony\Bundle\MakerBundle\Maker\AbstractMaker;
use Symfony\Component\Console\Command\Command;
use Symfony\Bundle\MakerBundle\DependencyBuilder;
use App\Entity\User;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Bundle\MakerBundle\InputConfiguration;
use Symfony\Bundle\MakerBundle\Generator;

/**
 * Utility command to quickly create a user entity from the command line.
 *
 * @package App\Maker
 */
final class AddUser extends AbstractMaker {

  /**
   * @var \Doctrine\ORM\EntityManagerInterface
   */
  private $entityManager;

  /**
   * {@inheritdoc}
   */
  public function __construct(EntityManagerInterface $entityManager) {
    $this->entityManager = $entityManager;
  }

  /**
   * {@inheritdoc}
   */
  public static function getCommandName(): string {
    return 'make:user:add';
  }

  /**
   * {@inheritdoc}
   */
  public function configureCommand(Command $command, InputConfiguration $inputConfig) {
    $command
      ->setDescription('Creates a new user account for the application.')
      ->addArgument('username', InputArgument::REQUIRED, 'The account username')
      ->addArgument('email', InputArgument::REQUIRED, 'The email address associated with the account')
      ->addArgument('password', InputArgument::REQUIRED, 'The account password');
    ;
  }

  /**
   * {@inheritdoc}
   */
  public function configureDependencies(DependencyBuilder $dependencies)
  {
    $dependencies->addClassDependency(
      Command::class,
      'console'
    );
  }

  /**
   * {@inheritdoc}
   */
  public function generate(InputInterface $input, ConsoleStyle $io, Generator $generator) {
    $user = new User();
    $user->setUsername($input->getArgument('username'));
    $user->setPassword($input->getArgument('password'));
    $user->setEmail($input->getArgument('email'));

    $this->entityManager->persist($user);
    $this->entityManager->flush($user);

    $this->writeSuccessMessage($io);
  }

  /**
   * {@inheritdoc}
   */
  protected function writeSuccessMessage(ConsoleStyle $io) {
    $io->newLine();
    $io->writeln(' <bg=green;fg=white>                                                                                                              </>');
    $io->writeln(' <bg=green;fg=white> Success! User has been created. Don\'t forget to assign roles to this user if they need elevated permission.  </>');
    $io->writeln(' <bg=green;fg=white>                                                                                                              </>');
    $io->newLine();
  }
}