Authentication servers are currently down

**Describe the bug**
Everytime I join a premium server, the client says that the minecraft authentication servers are offline, they arent offline tho.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to 'Multiplayer'
2. Click on 'Join server'
3. See error

**Expected behavior**
I would join the server normally

**Screenshots**

**Desktop (please complete the following information):**
- OS: Debian
- Version: 10

**Additional context**
I installed Java 8 because 5zig Mod didn't work before. I can only join cracked servers

Look at the authentication flow in the mod's code, likely in network or login handling classes. Check for any hardcoded URLs or configuration related to Minecraft authentication servers. Reproduce the issue by joining a premium server in a development environment and see where the error originates.

索引モデルが issue の本文から書いたものです。