(pam) for non local users trigger different exit code (user doesn't exist)

src/sbin/opnsense-auth

@@ -83,6 +83,9 @@ if (!empty($auth_data['user']) && isset($auth_data['password'])) {
         syslog(LOG_NOTICE, "user '".$auth_data['user']."' authenticated successfully (using fallback)\n");
         $exit_status = 0;
     } else {
+        if (getUserEntry($auth_data['user']) === false) {
+            $exit_status = 2;
+        }
         syslog(LOG_WARNING, "user '".$auth_data['user']."' could not authenticate.\n");
     }
 }