[BUG] Can't Login with Microsoft Account

[SatinFoil]

Describe the bug
Whenever I login with a microsoft account, everything seems normal, but then once it's finished, despite successfully logging in, the accounts list is blank. This also affects servers, and some versions only play as demos.

To Reproduce
Steps to reproduce the behavior:

1. Open Betacraft
2. Click the Accounts tab
3. Click Add a New Account
4. Enter the code and login like normal
5. Click Accept
6. Go back to betacraft
7. Wait a few seconds until the extra accounts window closes itsself
8. You will see there's still nothing there

Expected behavior
After adding an account, I assume it should appear on the list and I should be able to join servers and play full versions of all versions.

Screenshots
[Screenshot of the error it shows when joining servers]

Desktop (please complete the following information):

• Windows 11
• Betacraft version 2.0 (and one of the old 1.x releases)
• Desktop environment: Pro
• Processor architecture: 64 bit

[SatinFoil]

Anyone there?

[notdevcody]

This is due to undefined behavior, will be fixed in the C++ core rewrite.