Creation date/time retrieved by Users-LIST API is incorrect. #4325

Describe the Bug

In the LIST endpoint of the Users API, the created_at field value of the responded list element appears to be incorrect.
From the looks of it, it appears to be the same as the value of last_activity_at.
However, i do not know if this is really the case.

Steps to Reproduce

1. Create new user.
2. Obtain a list of users with the Users-LIST API.
   • The new user's created_at and last_activity_at are null.
3. Log in to the new user with a browser.
4. Obtain a list of users with the Users-LIST API.
   • The new user's created_at and last_activity_at are the same date and time.

Expected Behaviour

Users-LIST API gets the correct created_at.

Screenshots or Additional Context

No response

Browser Details

No response

Exact BookStack Version

v23.05.02

PHP Version

No response

Hosting Environment

Docker image, lscr.io/linuxserver/bookstack:version-v23.05.2