a way to add uids to existing keys in settings

[tomholub]

Actually, should we create a key with multiple emails (uids) when a user account has aliases, @tomholub?
I found this line in setup-create-key.ts:

That would be for separate issue, of course, since it concerns generating new keys.
But I think maybe not. We just got scolded by some user who accused us of "commingling their identities together" that they wanted to keep separate. In general, people may be sensitive if we did this automatically, and it's too much of a burden to ask new users, especially if most of them will never understand the difference.

I think the compromise there would be to continue only using primary user email, but in the future add a way to modify / add identities in the settings, for users who care.

I'll file a separate issue, but not for anytime soon.

Originally posted by @tomholub in #3907 (comment)