test: improve debugging for test

litellm/proxy/auth/user_api_key_auth.py

@@ -532,6 +532,12 @@ async def user_api_key_auth(
             api_key, str
         ):  # if generated token, make sure it starts with sk-.
             assert api_key.startswith("sk-")  # prevent token hashes from being used
+        else:
+            verbose_logger.warning(
+                "litellm.proxy.proxy_server.user_api_key_auth(): Warning - Key={} is not a string.".format(
+                    api_key
+                )
+            )
 
         if (
             prisma_client is None and custom_db_client is None