FES .upload from and current account should be passed separately for sendAs support #1265
Description
This is a subtle thing: from and current account may not be the same thing in the future - once we add support for different sendAs aliases, in which case you may send an email from alias@example.com while on account account@example.com. So this would really need an account and from separately, or in the future maybe idToken and from separately. For now though, it's ok. I'll file an issue.
Originally posted by @tomholub in #1261 (comment)