Don't return internal error details in bulk member responses; gate SSO token logging (#7777)

src/sso.rs

@@ -309,7 +309,11 @@ pub async fn exchange_code(
         user_name: user_name.clone(),
     };
 
-    debug!("Authenticated user {authenticated_user:?}");
+    if CONFIG.sso_debug_tokens() {
+        debug!("Authenticated user {authenticated_user:?}");
+    } else {
+        debug!("Authenticated user {identifier}");
+    }
     sso_auth.auth_response = Some(authenticated_user.clone());
     sso_auth.updated_at = Utc::now().naive_utc();
     sso_auth.save(conn).await?;