SSO "managed" account hashed are impossible to use

I self host sentry and have github SSO setup so anyone in our github org can automatically add themselves to sentry. An artifact of that is that everyone has a long hash as their username. I see in the sentry search bar that you can search by user such as or assigned:some.user this is great, but the autofill for these, only fills for username. Since all usernames are hashes, its pretty much impossible to search for a specific user.
The workaround is to go find out what their email is, then paste the email, but its not a very good experience.
Is there anyway to change the username (seems like I cant change it on a managed account)?
Maybe a feature request: use the email instead of the username for managed accounts for autofills in the search bar.