Letting us autocomplete with notes on users or set an alias in note

I think it'd be a nice feature if we could autocomplete to a note/alias that we give ourselves.

Right now if I type @user it will show the server's member's usernames and suggest names that contain the characters 'u', 's', 'e', and 'r' in that order. Below them it shows roles containing those characters.

When someone changes their username this stops working, which is a bit annoying when someone changes to 964976867 or something as their username.

It would be useful if we could put a note on them just saying 'username' or with some syntax like '@username' so that they're still suggested in the autocomplete when I type @user. The rest of chat would still just see "@964976867" since it would autocomplete to that instead of "@username", so it would just show to us using the feature.

This is similar to the threads asking for a nickname/alias, but they want it separate from the notes or just for searchability, I don't think any of them mention the autocompletion which would be the most useful to me.