From bbfc5852517edfa2b3d1da4611e16fe65d71e024 Mon Sep 17 00:00:00 2001
From: Julian Chang <wyvest@polyfrost.org>
Date: Mon, 20 Jul 2026 07:32:18 +0900
Subject: [PATCH] Give actual cause if login fails

---
 packages/oneclient_core/src/auth/mod.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/oneclient_core/src/auth/mod.rs b/packages/oneclient_core/src/auth/mod.rs
index f7e50ee7..2db82532 100644
--- a/packages/oneclient_core/src/auth/mod.rs
+++ b/packages/oneclient_core/src/auth/mod.rs
@@ -78,6 +78,13 @@ pub async fn finish_microsoft_login(
 
     if let Err(err) = &result {
         tracing::warn!("Microsoft login failed: {err}");
+        let mut chain = String::new();
+        let mut source = std::error::Error::source(err);
+        while let Some(cause) = source {
+            chain.push_str(&format!("\n  caused by: {cause}"));
+            source = cause.source();
+        }
+        tracing::warn!("Microsoft login failed: {err}{chain}");
     }
 
     let account = result?;