Removed users from LDAP authentication but didn't remove them from Splunk users

Hello, I see that there is documentation on this topic, but it is very unclear how it should be operating. So I am using LDAP authentication for Splunk and I removed a large group of users from my LDAP authentication step on a seperate application. However, this didn't remove the users from my list of splunk users. So I removed one specific user's folder in splunk/etc/users and the user is still not removed the splunk user list in UI. How should all of this functionality be working? If I remove the user from my LDAP authentication on my seperate app- will that user not be able to log in? Even though they are still listed a splunk user in my Access Controls- User list on the web? Thanks for the help!