[MM-29441] Fix errcheck issues in web_hub.go (#29614)

* fix errcheck for web_hub.go

* log user id

server/.golangci.yml

@@ -96,7 +96,6 @@ issues:
         channels/app/platform/session.go|\
         channels/app/platform/status.go|\
         channels/app/platform/web_broadcast_hook.go|\
-        channels/app/platform/web_hub.go|\
         channels/app/platform/web_hub_test.go|\
         channels/app/plugin_test.go|\
         channels/app/post_helpers_test.go|\