diff --git a/api/src/dooris_api/app.py b/api/src/dooris_api/app.py
index f239fa5..b7eed10 100644
--- a/api/src/dooris_api/app.py
+++ b/api/src/dooris_api/app.py
@@ -166,7 +166,7 @@ async def login_callback(
             return "/"
     else:
         logger.debug(
-            "could not authenticate user because of OIDC error; redirecting to error page with error messages intact"
+            f"could not authenticate user because of OIDC error '{auth_result}'; redirecting to error page with error messages intact"
         )
         return f"/login-error?{req.query_params}"