Add deployment check that dummy provider is not configured (#3340)

app/grandchallenge/profiles/__init__.py

@@ -0,0 +1,22 @@
+from django.core.checks import Error, register
+
+
+@register(deploy=True)
+def check_dummy_provider_is_not_used(app_configs, **kwargs):
+    from django.conf import settings
+
+    errors = []
+
+    if (
+        "dummy" in settings.SOCIALACCOUNT_PROVIDERS.keys()
+        or "allauth.socialaccount.providers.dummy" in settings.INSTALLED_APPS
+    ):
+        errors.append(
+            Error(
+                "The dummy social account provider is configured. This provider should only be used for testing purposes and not in production.",
+                hint="Remove the dummy provider from SOCIALACCOUNT_PROVIDERS and INSTALLED_APPS in your settings.",
+                id="grandchallenge.profiles.E001",
+            )
+        )
+
+    return errors

app/tests/profiles_tests/test_checks.py

@@ -0,0 +1,25 @@
+from grandchallenge.profiles import check_dummy_provider_is_not_used
+
+
+def test_check_dummy_provider_is_not_used(settings):
+
+    errors = check_dummy_provider_is_not_used(None)
+
+    assert len(errors) == 1
+    assert errors[0].id == "grandchallenge.profiles.E001"
+    assert (
+        errors[0].msg
+        == "The dummy social account provider is configured. This provider should only be used for testing purposes and not in production."
+    )
+
+    settings.SOCIALACCOUNT_PROVIDERS = {"dummy": {}}
+    settings.INSTALLED_APPS.remove("allauth.socialaccount.providers.dummy")
+
+    errors = check_dummy_provider_is_not_used(None)
+
+    assert len(errors) == 1
+    assert errors[0].id == "grandchallenge.profiles.E001"
+    assert (
+        errors[0].msg
+        == "The dummy social account provider is configured. This provider should only be used for testing purposes and not in production."
+    )