Add custom user mapper for openid

karma/karma/openid.py

@@ -0,0 +1,22 @@
+from django.contrib.auth import get_user_model
+from simple_openid_connect.integrations.django.models import OpenidUser
+from simple_openid_connect.integrations.django.user_mapping import UserMapper
+
+
+class KarmaUserMapper(UserMapper):
+    def handle_federated_userinfo(self, user_data):
+        # if there is already a user with this username, we create the openid association if it does not exist yet
+        User = get_user_model()
+        try:
+            user = User.objects.get(username=user_data.preferred_username)
+            OpenidUser.objects.get_or_create(
+                sub=user_data.sub,
+                defaults={
+                    "user": user,
+                },
+            )
+        except User.DoesNotExist:
+            # if the user does not exist, it is automatically created by the super class
+            pass
+        return super().handle_federated_userinfo(user_data)
+

karma/urls.py

@@ -10,7 +10,5 @@
     path('', lambda req: redirect('karma_index'), name='index'),
     path('api/', include('karma.api.urls')),
     path('calibration/', include('karma.calibration.urls')),
-    path('login/', auth_views.LoginView.as_view(), name='login'),
-    path('logout/', auth_views.LogoutView.as_view(), name='logout'),
     path("auth/openid/", include("simple_openid_connect.integrations.django.urls")),
 ]