VIAaaS
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Idea: server.example.com._p25565._v1_12_2._otrue.viaaas.example.com (default backend 25565 port and version default as auto, online-mode can be optional/required) (similar to tor to web proxies)

- TODO: _o option for disabling online mode only in front end, protocol auto detection

- Connection to private IP addresses are currently blocked

- VIAaaS auth page is designed for storing accounts in the browser local storage.
 It requires a CORS Proxy for calling Mojang APIs, which may make Mojang see that
 as suspicious and reset/block your account password.

- VIAaaS may have security vulnerabilities, make sure to block the ports in firewall and take care of browser local storage.

Usage for offline mode:
- Run the shadow jar or ./gradlew clean run
- Connect to mc.example.com._v1_8.viaaas.localhost

Usage for online mode (may block your Mojang account):
- Run the shadow jar or ./gradlew clean run
- You'll need 2 premium accounts for online mode
- Set up a CORS Proxy (something like https://github.com/Rob--W/cors-anywhere (less likely to look suspicious to Mojang if you run on your local machine) or https://github.com/Zibri/cloudflare-cors-anywhere (more suspicious)).
- Go to https://localhost:25543/auth.html, configure the CORS Proxy URL and listen to the username you're using to connect.
- Log in into Minecraft account with the username you'll use in _u option via browser.
- Connect to mc.example.com._v1_8.viaaas._u(BACKUSERNAME).localhost
- Approve the login
- There are some information about Mojang password resetting: https://github.com/GeyserMC/Geyser/wiki/Common-Issues#mojang-resetting-account-credentials