Unable to login with Microsoft's secondary alias email

[xhayper]

When trying to log in using Microsoft's alias email feature, the following error show up.

[  ..  ] Processing authentication against Minecraft services...
[FAILED] Incoherent authentication data, please retry.

I tried logging in with the Minecraft launcher and was able to login

[xhayper]

Caused by

portablemc/portablemc/auth.py

Line 263 in e98452a

return id_token_payload["nonce"] == nonce and id_token_payload["email"].casefold() == email.casefold()

id_token_payload["email"].casefold() == email.casefold()

The payload return the primary alias instead of the email we used to login

[xhayper]

Did some more digging and it turns out the email scope return the primary email

[mindstorm38]

I made this so users could not login with another account than the one they specified in the command line. Didn't know that alias existed..