Discord
Posts a message in the Discord channel you choose for each event. There is no key to copy: you connect on Discord's own screen.
Open Discord in the panel
In Integrations, click Connect on the Discord card. Fill in the Name, tick the events under When to notify and click Connect with Discord.
Pick the server and channel
On Discord's screen, pick the server and channel that will receive the messages and click Authorize. You need permission to manage webhooks on that server.
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Discord authorization screen with the server and channel pickers
Run a test
You return to the panel with the Integration connected notice. Click Send test and watch the message arrive in the channel.