Hi John,
If you have created a group in Quick Base of your users it is possible to invite that group into a specific role in your application instead of needing to manage each individual user's access. This way as users are removed from the group that change cascades to the apps that group is added in. You can do this when adding a user by searching for the name you gave that group in the add a new user dialog box that pops up.
https://help.quickbase.com/user-assistance/sharing_a_database.htmlThe help topic goes a little more in depth for what you would do to add a group to an application. We make use of groups here in Quick Base ourselves to help manage application access with different groups for different departments or functional teams. It gives us another tool to help control access and simplify management of users. I hope this information is helpful John.