+    @classmethod
+    def reset(cls, email):
+        cls.objects.filter(email=email).delete()
+        Schedule = apps.get_model('club', 'Schedule')
+        Membership = apps.get_model('club', 'Membership')
+        for schedule in Schedule.objects.filter(email=email):
+            schedule.update_contact()
+        for membership in Membership.objects.filter(manual=True, user__email=email):
+            membership.update_contact()
+
+    def wl_optout_url(self):
+        return 'https://wolnelektury.pl' + self.get_optout_url()
+