You need a channel link from Discord or Slack. It takes a minute, and you need to be allowed to manage your Discord community or add apps in Slack. The Notifications page shows the exact menu names.
Discord
- Open your Discord community's settings and choose Integrations.
- Create a new one there, pick the channel the alerts should land in and name it, for example LaunchRivals.
- Copy its link.
Slack
- Add Slack's app for incoming messages to your workspace. The Notifications page names it.
- Pick the channel for your alerts.
- Copy the link Slack gives you.
Then, in LaunchRivals
- Open Notifications on Indie or Studio.
- Paste the link under Discord & Slack, give it a name and click Connect channel.
- Click Send test, then tick Discord / Slack on your alerts.
Tip: treat the channel link like a password. Anyone who has it can post in that channel.