Change the name of the root user

Hi, how do I change the name of the root user?

Nope ! That's impossible man you can't do it , the root user always stays root

When installing kali, user and password are "kali" and "kali" the password can be changed but the user is there really no way to change it? So anyone who has a kali linux installation has "kali" as a user? Sorry, but I did not understand.