change Club.unix_name to Club.slug_name and remove it from forms

counter/models.py

@@ -44,7 +44,6 @@ from core.fields import ResizedImageField
 from core.models import Group, Notification, User
 from core.utils import get_start_of_semester
 from counter.apps import PAYMENT_METHOD
-from sith.settings import SITH_MAIN_CLUB
 from subscription.models import Subscription
 
 
@@ -569,7 +568,7 @@ class Counter(models.Model):
         if self.type != "BAR":
             return False
         # at least one of the barmen is in the AE board
-        ae = Club.objects.get(unix_name=SITH_MAIN_CLUB["unix_name"])
+        ae = Club.objects.get(id=settings.SITH_MAIN_CLUB_ID)
         return any(ae.get_membership_for(barman) for barman in self.barmen_list)
 
     def get_top_barmen(self) -> QuerySet:

counter/tests/test_counter.py

@@ -783,7 +783,7 @@ class TestCounterStats(TestCase):
         s = Selling(
             label=barbar.name,
             product=barbar,
-            club=Club.objects.get(name=settings.SITH_MAIN_CLUB["name"]),
+            club=baker.make(Club),
             counter=cls.counter,
             unit_price=2,
             seller=cls.skia,