Merge Accounts, Per-Server Names

Please implement the ability to have different names per discord and to transfer discords to different accounts. I want to merge my old account, like so:

original:
old account in: user A in discord 1, user A in discord 2, user A in discord 3
new account in: user B in discord 1

merge old into new:
old account in: user A in discord 1
new account in: user B in discord 1, user A in discord 2, user A in discord 3