class MobileToken(models.Model): verification_code=models.CharField(max_length=225) user=models.ForeignKey(settings.AUTH_USER_MODEL, related_name="mobile_tokens",on_delete=models.CASCADE) phone_number=models.CharField(max_length=225) is_used=models.BooleanField(default=False) created = models.DateTimeField("Created on", auto_now_add=True)