Trello Connection Guide in Unified

To establish a Trello connection within Unified, users must create a Trello app, obtain its API key, and configure specific settings to allow Unified domains as allowed origins. The process involves navigating to the Trello Power-Ups Admin to create a new app, copying the API key from the app details page, and pasting it into the required field on the Unified platform. Users must also add specified URLs, including the Unified app and API domains, as allowed origins in their Trello app settings. This setup must be completed by saving the settings and finalizing the connection flow on Unified. Troubleshooting may involve verifying the correct API key, ensuring all allowed origins are accurately added, and confirming the inclusion of the appropriate regional API domain.