Schubilegend/SchubiAuthV2 — reverse-engineered prompt

Build me a simple Minecraft Forge mod for version 1.8.9 called SchubiAuth. I want an in game screen where I can paste a Minecraft session ID for an account I own, log in with it, and later restore my original Minecraft session without restarting.

It should tell me if the session looks valid, handle bad or empty input cleanly, and show whether the account is currently online on Hypixel if that can be checked. I also want safe tools to change the logged in account username and skin by pasting a skin image URL, but please add a clear guard so I can’t accidentally change the name or skin on my main account.

Keep the UI simple and beginner friendly, with clear success and error messages. Set it up as a Gradle based Forge mod that I can build myself and drop into the mods folder. Look up current docs online if needed.