def METHOD_NAME():
    # delete inactive users whose activation link expired and who never logged in
    # (this will not delete users who have used their account and were later disabled)
    models.User.objects.filter(
        is_active__isnull=True,
        last_login__isnull=True,
        created__lt=timezone.now()
        - settings.VALIDITY_PERIOD_VERIFICATION_SIGNATURE,
    ).delete()