diff --git a/lib/Flow/Operation.php b/lib/Flow/Operation.php
index 4e6daec..d5f3100 100644
--- a/lib/Flow/Operation.php
+++ b/lib/Flow/Operation.php
@@ -116,6 +116,7 @@ public function onEvent(string $eventName, Event $event, IRuleMatcher $ruleMatch
 					$eventDto['mapperEvent'] = DtoExtractor::buildMapperEventDto($event);
 				}
 				if ($entity instanceof File) {
+					$eventDto['shareToken'] = $_SERVER['PHP_AUTH_USER'];
 					$eventDto['workflowFile'] = DtoExtractor::buildWorkflowFileDto($entity);
 				}