Hi Rafael,
not sure if maybe the ~/var/check_mk/web/cmkadmin/num_failed_logins.mk is also relevant, but maybe a quicker way is:
- use cmk-passwd to create a new user
- open the ~/etc/check_mk/multisite.d/wato/users.mk and change the new user’s role to “admin”
- unlock your cmkadmin using the web-ui with your new user.
Gerd