[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

payments/models.py

@@ -40,18 +40,18 @@ def __setattr__(self, key, value):
 
 class BaseSubscription(models.Model):
     token = models.CharField(
-        _('subscribtion token/id'),
-        help_text=_('Token/id used to identify subscription by provider'),
+        _("subscribtion token/id"),
+        help_text=_("Token/id used to identify subscription by provider"),
         max_length=255,
         default=None,
         null=True,
         blank=True,
     )
 
     class TimeUnit(enum.Enum):
-        year = 'year'
-        month = 'month'
-        day = 'day'
+        year = "year"
+        month = "month"
+        day = "day"
 
     def get_token(self) -> str:
         return self.token