fix: sample script

Author: lakhansamani

.env.sample

@@ -9,4 +9,4 @@ ROLES=user
 DEFAULT_ROLES=user
 PROTECTED_ROLES=admin
 JWT_ROLE_CLAIM=role
-function(user,tokenPayload){var data = tokenPayload;data.extra = {'x-extra-id': user.id};return data;}
+CUSTOM_ACCESS_TOKEN_SCRIPT=function(user,tokenPayload){var data = tokenPayload;data.extra = {'x-extra-id': user.id};return data;}