diff --git a/index.js b/index.js
index 7f3f67e..2484898 100644
--- a/index.js
+++ b/index.js
@@ -27,7 +27,8 @@ async function login (user, password, host = '') {
       if (res.status !== http_consts.status_ok)
         return '';
 
-      return await res.text ();
+      const session_id = await res.text ();
+      return session_id;
     });
 
   if (salt_str === '')