diff --git a/.env.sample b/.env.sample
index b2dffd7..52a0d3d 100644
--- a/.env.sample
+++ b/.env.sample
@@ -8,4 +8,5 @@ JWT_TYPE=HS256
 ROLES=user
 DEFAULT_ROLES=user
 PROTECTED_ROLES=admin
-JWT_ROLE_CLAIM=role
\ No newline at end of file
+JWT_ROLE_CLAIM=role
+function(user,tokenPayload){var data = tokenPayload;data.extra = {'x-extra-id': user.id};return data;}
\ No newline at end of file