attempts command and not the blacklist command.
user@host:~ $ eurephiadm adminaccess --revoke --uid 3 -a blacklist
eurephia::UserAdmin: Access level revoked
user@host:~ $ eurephiadm adminaccess --list
[uid] Username Intf. Access level
------------------------------------------------------------------------------
[ 1] john.doe C attempts
C blacklist
C certadmin
C config
C fwprofiles
C useradmin
[ 3] jane.doe C attempts
------------------------------------------------------------------------------
user@host:~ $