use Symfony\Component\Form\Extension\Core\Type\PasswordType;

class RegistrationType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('email')
            ->add('username')
            ->add('password',         PasswordType::class)
            ->add('confirm_password', PasswordType::class)
        ;
    }
}