Fix typo in Utils include

Change-Id: Iea4633c58933372b8ae2b0e8dc26ff3a7fbd4b46
diff --git a/User.php b/User.php
index 2341eb0..6a9e2cf 100644
--- a/User.php
+++ b/User.php
@@ -1,6 +1,6 @@
 <?php
 require_once 'vendor/autoload.php';
-include_once 'util.php';
+include_once 'utils.php';
 
 class User
 {