Timeline-Error Comments on Cards by Guests

Hey,

First of all, thank you very much for your effort: Nextcloud Deck is a great work relief for me!

I sometimes use Deck as a ticket system. I therefore set comments directly in the database. So far, this all works well too. Only in the "Timeline" an error message is displayed if I specify a non-existent user in the activity in the "subjectparams" under "author":

Rich subject or parameter for "{user} hat die Karte {card} kommentiert" is malformed

This is due to the following code line:
https://github.com/nextcloud/deck/blob/15c5170195d243b42612375771ea174e714358cb/lib/Activity/DeckProvider.php#L103

I have removed the condition and now the "Timeline" works as desired.

Is there a reason for this condition? If not, please remove this condition so that I don't have to adjust the code line again after each update.

Thanks in advance!

Start at lib/Activity/DeckProvider.php around line 103 and inspect why the author parameter is rejected when the referenced user does not exist. Verify the Timeline behavior for a comment whose activity subjectparams names a non-existent author; done means it no longer displays the malformed rich-subject error.