Adversus closes a user's account if the password is typed incorrectly 5 times. If you want to open up again, you can get a guide for help here.
1. Go to "User" in the left-hand menu.
2. Select this icon to the right of the user, which looks like a closed padlock:
3. Here you see actually how to do it.
NB: Be aware of your GDPR compliance so nobody gets access to data they shouldn't.