Removing User Completely

Nextcloud version: 13.0.4
Operating system and version: Ubuntu 18.04
PHP version: 7.0.30

When setting up our LDAP settings, we added a group that contained some accounts that we did not want access. We removed that group, which removed the users, but the user still shows up when clicking the little people icon in the top righ corner of the UI. Other uses can also still search for the user when sharing files, but when the user is selected, it gives them an invalid user error. We would like to compeletly remove the user so he is not visible to any one.

I found the guides suggesting to use the occ commands, but when I run
sudo -u www-data php occ ldap:show-remnants
I get no results.

Is there anyway to completely remove this user?