From b0d0e791eaa79f44a02df7a165781920779157e6 Mon Sep 17 00:00:00 2001
From: Jake Schafer <pickle.plaza@gmail.com>
Date: Mon, 28 Aug 2023 14:34:13 -0500
Subject: [PATCH] fix callback error

---
 packages/pusher_beams/lib/pusher_beams.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/pusher_beams/lib/pusher_beams.dart b/packages/pusher_beams/lib/pusher_beams.dart
index 8b5d62e..4f4008e 100755
--- a/packages/pusher_beams/lib/pusher_beams.dart
+++ b/packages/pusher_beams/lib/pusher_beams.dart
@@ -333,7 +333,7 @@ class PusherBeams extends PusherBeamsPlatform with CallbackHandlerApi {
         callback((args[0] as List<Object?>).cast<String>());
         return;
       case "setUserId":
-        callback(args[0] as String?);
+        callback(args.isEmpty ? null : args[0] as String?);
         return;
       case "onMessageReceivedInTheForeground":
         callback((args[0] as Map<Object?, Object?>));