GUI Player Authentication Plugin - Secure Your Server with PIN Authentication

🔒 GUI Player Authentication is a Minecraft plugin that enhances server security by requiring players to set up and enter a secure PIN before they can interact with the world. This plugin prevents unauthorized access, ensuring that only verified players can play.

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🔹 Features

✅ PIN Registration & Login: Players must register a 4-digit PIN (or any other configured value) on their first login and use it for future authentications.
✅ Custom Chest GUI: Players enter their PIN using a visually appealing Chest GUI with Light Blue Dye items representing digits.
✅ Auto-Kick System: If a player fails to authenticate within 30 seconds, they will be automatically kicked from the server.
✅ PIN Verification: If the entered PIN is incorrect, the player is kicked immediately to prevent brute-force attempts.
✅ Player Restrictions: Until authentication is complete, players cannot move, chat, execute commands, or interact with the world.
✅ Blindness Effect: Unauthenticated players receive a permanent blindness effect until they log in successfully.
✅ PIN Reset Command (/resetpin): Players can reset their PIN and register a new one at any time.

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🔹 How It Works

1. New Players:

   • Upon joining, if the player has no PIN registered, they are shown a Register GUI where they must select a 4-digit PIN (or however many digits the user inputs in config.yml.
   • Once confirmed, the PIN is stored securely in a SQLite database, and the player is granted access to the server.

2. Returning Players:

   • If the player already has a PIN, they are shown the Login GUI and must enter their correct PIN.
   • A correct PIN removes all restrictions, while an incorrect PIN results in an immediate kick.

3. Auto-Kick for Unauthenticated Players:

   • If a player does not authenticate within 30 seconds, they are automatically kicked from the server.

4. PIN Reset:

   • Players can use /resetpin to delete their PIN and start the registration process again.

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🔹 Commands & Permissions

Command	Description	Permission
/resetpin	Resets the player's PIN and prompts for re-registration.	All Players

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🔹 Configuration (config.yml)

# The number of digits required for PIN authentication
pin_length: 4

• Customizable PIN length if needed.

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🔹 Why Use This Plugin?

🔹 Prevents Account Hijacking: Ensures that only the real player can log into their account.
🔹 Brute-Force Protection: Instant kicks for incorrect PIN attempts prevent unauthorized access.
🔹 User-Friendly GUI: Players interact through an intuitive Chest GUI instead of typing commands.
🔹 Lightweight & Efficient: Uses SQLite storage for easy setup and low server impact.
🔹 Perfect for Private & Public Servers: Ideal for SMPs, Minigame servers, and RP servers that need an extra layer of security.

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🔹 Installation

1. Download the Plugin .jar File.
2. Place it in the /plugins folder of your Minecraft server.
3. Restart the server.
4. Customize settings in /plugins/GUIPlayerAuth/config.yml (optional).
5. Enjoy a more secure Minecraft experience!

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💾 Compatibility

✅ Supports Minecraft 1.21+
✅ Works with Paper, Spigot, and Bukkit servers

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🔹 Future Updates & Features

🔜 MySQL Support for multi-server authentication
🔜 Configurable Auto-Kick Time
🔜 Admin Override Commands

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🎉 Secure your server today with GUI Player Authentication! 🎉