Fix error for unauthenticated user plan checks

core/templatetags/has_plan.py

@@ -1,8 +1,11 @@
 from django import template
-from core.models import User
+
 register = template.Library()
 
+
 @register.filter
 def has_plan(user, plan_name):
+    if not hasattr(user, "plans"):
+        return False
     plan_list = [plan.name for plan in user.plans.all()]
-    return plan_name in plan_list
+    return plan_name in plan_list