Add SonoNiko Tickets to your Discord server from tickets.sononiko.it and activate premium.
In the dashboard open your server → Integrations → Create API key. Copy it right away: it's shown only once. If you already use ReportSystem, you can reuse the same key.
Put DiscordLink-1.0.0.jar in the plugins/ folder, start the server once and stop it.
In plugins/DiscordLink/config.yml set the license key and the API key:
After purchase you'll find your key in Customer area → Licenses on sononiko.it. Without a valid key the plugin disables itself on startup. If you change hosting, use "Change IP / server" in the customer area (up to 3 times).
sync-interval-minutes: how often online players are synced (1–60, default 5). Players are also synced on join.
groups.add-command / groups.remove-command: commands used to add and remove groups. LuckPerms by default; change them for other permission plugins ({uuid}, {player}, {group}).
rewards.enabled and rewards.commands: rewards given once, on first link ({player}, {uuid}, {discord}).