"Other..." New user has been created and it wasn't me. (Monterey 12.4 ( 21F79))

2 days ago when I turned on my machine I found this screen: ("Otra...") means other in English, sorry but it's all in Spanish. When I go to check in the dictionary utility if the root user is activated, I confirm that it is not, anyway I activate it again, I change the password again, and I deactivate it again, this did not work, it does not work either to do with the "guest user", I have already formatted the entire system and I have done a clean reinstall of the operating system from scratch. But the problem persists, my head begins to formulate strange theories about an application or someone remotely creating that user with root privileges, I read some old posts about it but we are talking about Yosemite, by the way the version of the operating system is: ] I would really appreciate if someone could guide me on what is happening on my login screen. **EDIT)** As I said before, the root user was always disabled and I checked it numerous times, the code proposed by ICONDAEMON worked, in fact, the user “Other…” disappeared, I mean this code:sudo defaults write /Library/Preferences/com.apple.loginwindow SHOWOTHERUSERS_MANAGED -bool FALSE. But the feeling that this gives me is that this user was simply hidden, it's chilling, I would like to know how that user was created, thanks for your contributions **EDIT2)** sudo defaults write /Library/Preferences/com.apple.loginwindow SHOWOTHERUSERS_MANAGED -bool TRUE - for example, in the opposite way, if I use the term TRUE, the user “OTHER…” reappears, therefore this code is not to eliminate that user definitively, but rather to hide it, it is chilling – When I go to “Dictionary Utility”, under “services”, two options appear: 1-Active directory and 2-LPAPv3. This is ok? –