remove uuid primary key

Signed-off-by: Nico Schottelius <nico@nico-notebook.schottelius.org>

uncloud_auth/models.py

@@ -17,11 +17,8 @@ class User(AbstractUser):
             decimal_places=AMOUNT_DECIMALS,
             validators=[MinValueValidator(0)])
 
-    # Need to use the string here to prevent a circular import
-    primary_billing_address = models.ForeignKey('uncloud_pay.BillingAddress',
-                                                   on_delete=models.PROTECT,
-                                                   blank=True,
-                                                   null=True)
+    # @property
+    # def primary_billing_address(self):
 
     @property
     def balance(self):