Usermin webmail login blocked after too many attempts

OS type and version debian 10 (buster)
Webmin version 2.00
Usermin version 1.860

I came across this late post about getting locked out of usermin.

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I encouraged some users to use usermin, and of course they locked themselves out. But before I saw the late post I assumed this was blocked with fail2ban using webmin-auth maybe. This wasn’t the case, and I can see that this was an internal function.

Wouldn’t it make more sense to do this with fail2ban? I mean restarting webmin seems cumbersome, specially if several users would be using usermin no?