Fix patreon not sharing between guild members

src/web/routes/dashboard/api/user/mod.rs

@@ -74,7 +74,7 @@ pub async fn get_user_info(
         let preferences = sqlx::query!(
             "
             SELECT
-                timezone,
+                IFNULL(timezone, 'UTC') AS timezone,
                 use_browser_timezone,
                 dashboard_color_scheme,
                 reset_inputs_on_create