The Restyaboard integration adds a dashboard widget to your dashboard that shows all of your essential alerts, a search provider that searches for cards in a consistent way and alerts about recent activity related to your assigned cards. Restyaboard is an open-source alternative to Trello. Restyaboard comes in both self-hosted downloadable and cloud options. It has features like offline sync, diff /revisions, nested comments, multiple view layouts. It is more like an electronic sticky note for organizing tasks and todos.
The account configuration happens in the "Connected accounts" user settings section.
Users who haven't set up a Restyaboard account will see a link to the "Connected accounts" user settings area in the widget.
If you wish to let your Nextcloud users to use OAuth to authenticate to Restyaboard, go to the "Connected accounts" admin settings area.