auth field check

BackEnd/src/classes/Request.class.php

@@ -105,6 +105,9 @@ class Request
     {
         // Field names are case-insensitive : https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html
         $headers = array_change_key_case(getallheaders());
+        if (!isset($headers['authorization'])) {
+            throw new Exception("Missing Authorization field");
+        }
         $autorization = $headers['authorization'];
         $arr = explode(" ", $autorization);