pylint: disable error on seemingly used-before-assigned variable (#74065)

src/authentic2/backends/ldap_backend.py

@@ -432,7 +432,7 @@ class LDAPUser(User):
             self.pk = self.keep_pk
         super().save(*args, **kwargs)
         if hasattr(self, 'keep_pk'):
-            self.pk = pk
+            self.pk = pk  # pylint: disable=used-before-assignment
 
     @property
     def can_reset_password(self):