Hello and Welcome to LinuxQuestions,
What distro are you using? That's minimal information that you should post along with the version of the distro.
Try using
or for more detail on options, check out the man page
Code:
man deluser
man adduser
man useradd
man userdel
man usermod
The two first commands, adduser and deluser do more than the useradd, userdel commands in an automatic way.
Kind regards,
Eric