fix api crash and add regression test

Author: mfosterw

democrasite/users/api/views.py

@@ -25,9 +25,7 @@ class UserViewSet(RetrieveModelMixin, ListModelMixin, UpdateModelMixin, GenericV
     lookup_field = "username"
 
     def get_queryset(self, *args, **kwargs):
-        user_id = self.request.user.id
-        assert user_id is not None
-        return self.queryset.filter(id=user_id)
+        return self.queryset.filter(id=self.request.user.id)
 
     @action(detail=False)
     def me(self, request):

democrasite/users/tests/api/test_views.py

@@ -1,4 +1,5 @@
 import pytest
+from django.contrib.auth.models import AnonymousUser
 from rest_framework.test import APIRequestFactory
 
 from democrasite.users.api.views import UserViewSet
@@ -20,6 +21,14 @@ def test_get_queryset(
 
         assert user in view.get_queryset()
 
+    def test_logged_out(self, api_rf: APIRequestFactory, view: UserViewSet):
+        request = api_rf.get("/fake-url/")
+        request.user = AnonymousUser()
+
+        view.request = request
+
+        assert not view.get_queryset()
+
     def test_me(self, api_rf: APIRequestFactory, user: User, view: UserViewSet):
         request = api_rf.get("/fake-url/")
         request.user = user