Forward a sid to GPM when downloading a premium package

CHANGELOG.md

@@ -4,6 +4,7 @@
 1. [](#improved)
     * Auto-link a plugin/theme license in details if it starts with `http`
     * Allow to fallback to `docs:` instead of `readme:`
+    * Forward a `sid` to GPM when downloading a premium package 
 1. [](#bugfix)
     * Fixed Safari issue with new ACL picker field [#1955](https://github.com/getgrav/grav-plugin-admin/issues/1955)
 

classes/plugin/Gpm.php

@@ -293,7 +293,8 @@ class Gpm
         if ($package->premium) {
             $query = \json_encode(array_merge($package->premium, [
                 'slug'        => $package->slug,
-                'license_key' => $license
+                'license_key' => $license,
+                'sid' => md5(GRAV_ROOT)
             ]));
 
             $query = '?d=' . base64_encode($query);