fixup! Resolve any settings.AUTH_USER_MODEL used as to in relation

Author: flaeppe

tests/typecheck/models/test_contrib_models.yml

@@ -104,3 +104,29 @@
                   users = models.ManyToManyField(settings.AUTH_USER_MODEL)
                   user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
                   unq_user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
+
+-   case: test_relate_to_auth_user_model_when_auth_not_installed
+    main: |
+        from other.models import Other
+        reveal_type(Other().user)
+    out: |
+        main:2: note: Revealed type is "myapp.models.MyUser"
+    custom_settings: |
+        INSTALLED_APPS = ('django.contrib.contenttypes', 'myapp', 'other')
+        AUTH_USER_MODEL='myapp.MyUser'
+    files:
+        - path: myapp/__init__.py
+        - path: myapp/models.py
+          content: |
+              from django.db import models
+
+              class MyUser(models.Model):
+                  ...
+        - path: other/__init__.py
+        - path: other/models.py
+          content: |
+              from django.conf import settings
+              from django.db import models
+
+              class Other(models.Model):
+                  user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)