Finding "People" Account by Email Lookup

I have a list of email addresses without names, and I’d like to translate that to the user in Coda. Is that possible?

Are all the users in the doc? Or at least has the doc been shared with them?

No, private doc. Can’t share it with them, unfortunately.

Is it possible to do this in a space where they all exist then copy it?

You can probably use cross doc for this