core: add notice about duplicate keys

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/core/api/utils.py

@@ -14,7 +14,7 @@ def is_dict(value: Any):
     """Ensure a value is a dictionary, useful for JSONFields"""
     if isinstance(value, dict):
         return
-    raise ValidationError("Value must be a dictionary.")
+    raise ValidationError("Value must be a dictionary, and not have any duplicate keys.")
 
 
 class PassiveSerializer(Serializer):

authentik/outposts/api/outposts.py

@@ -51,7 +51,7 @@ class OutpostSerializer(ModelSerializer):
                 raise ValidationError(
                     (
                         f"Outpost type {self.initial_data['type']} can't be used with "
-                        f"{type(provider)} providers."
+                        f"{provider.__class__.__name} providers."
                     )
                 )
         return providers