[5.1.x] Refs #36140 -- Added missing import in django/contrib/auth/forms.py.

Follow up to 8552eef.

Author: felixxm

django/contrib/auth/forms.py

@@ -15,6 +15,7 @@
 from django.utils.text import capfirst
 from django.utils.translation import gettext
 from django.utils.translation import gettext_lazy as _
+from django.views.decorators.debug import sensitive_variables
 
 UserModel = get_user_model()
 logger = logging.getLogger("django.contrib.auth")