Link license to Discord

Pick the product, enter your KeyAuth license, Discord user ID, and email. The server validates against that application and appends to registry.json next to server.js.

Sign in is required. Allowed logins are listed in users.json next to server.js (see users.json.example). Use http://127.0.0.1:8787/, not file://. App buttons must match KeyAuth names in CONFIG.applications.