How do I connect TickTick?

Open the TickTick card in Settings → Task apps and click "Connect with TickTick". Your web browser opens on TickTick's sign-in page — approve it and you're done. There's no token to find and no developer setup: the app stays signed in and refreshes itself silently. If the connection ever expires you'll see a Reconnect prompt — it's one click through the browser again.