Request: Catch and handle "Account migrated, use e-mail as username." login error

[spxza]

Launcher Version: All

Operating System: All

Java Version: All

Antivirus Program: N/A

Description of Problem:

Having migrated my Mincraft account to Mojang, I am required to login with my Mojang-registered email address, rather than my Minecraft username. The launcher does not understand this error, so asks if I would like to play offline.

To reproduce: Migrate your account to Mojang's Identity Servers (via a section that appears on http://minecraft.net/profile) and login. Or if you have migrated, login with your minecraft username.

Error Messages:

None, but there should be a message asking the user to use their email address to sign in, rather than their minecraft username.

Error Log:

2013/06/01 10:41:23 [sEVERE] Unknown login result: Account migrated, use e-mail as username.