As a WCQS maintainer I want to be able to block specific users so that I can have a quick way of blocking actions that threaten the stability of WCQS.
We implemented authentication for WCQS, but to better leverage it, we should at least be able to ban users, since now we can identify them. Since blocking will happen during WCQS issues in most cases, we don't really need a dynamic mechanism for this - we can restart the service if necessary.
AC:
- There is a configurable list of banned users
- WCQS blocks traffic from specific users