How to change the autocomplete for a user reference to show First/Last name instead of username? I want to add a user reference field to an "event" content type, and reference the user who will present.

But I wonder how to change the entity reference - I've tried using the "filter by an entity reference view" with a view I created, but it still only shows the username.
Similar to Show node IDs along with titles in Entityreference Autocomplete list except in the rewrite of your user name field use {{field_first_name}} {{field_last_name}} and you need to add those fields ABOVE your user name field, in order to get access to those replacement patterns.