MWS: $:/status/UserName not set

[baikal]

Describe the bug

The logged in username does not get sent as $:/status/UserName for a /wiki/xxx, therefor even when logged in the "cloud" icon (SyncerDropdown) shows 'You are logged in' but not showing the user, as the source would suggest in multiwikiclient/syncer-actions-login-status.tid:

You are logged in<$reveal state="$:/status/UserName" type="nomatch" text="" default=""> as <strong><$text text={{$:/status/UserName}}/></strong></$reveal><$reveal state="$:/status/IsReadOnly" type="match" text="yes" default="no"> (read-only)</$reveal>

Expected behavior

$:/status/UserName will be set when logged in.
This would also help for editing tiddlers, as the user would be 'just filled in', as well as eg. the 'comments' plugin.

To Reproduce

1. Setup as "Installation using Git" from https://mws.tiddlywiki.com/
2. create user/login
3. open any /wiki from the example/demo
4. check $:/status/UserName

Screenshots

No response

TiddlyWiki Configuration

• latest from git (branch multi-wiki-support) b4583ef

Additional context

No response