Fornt-end users list how to make first-name sortable?

Hello all, How to make the first-name and last-name can be sort column-? Please if you know share the code! see screenshot :huh:

I have created more than one list and for each have a sorting. its worked with the dropdown userlists.

@krileon
There's no column header sorting functionality for userlists. You'd need to make a new userlist with each sorting preference already configured and they can select from the userlists available using the dropdown. Column sorting will eventually be available, but probably not until we do the userlist rewrite as we plan to rewrite all of the userlist code.