Connect your UNA site to one Xero organization from Studio. You save a Xero app's Client ID and Client Secret, click Authorize, and then custom code or other apps can create Xero contacts for members and approved sales invoices, which Xero can email straight away. No bundled UNA app calls it yet, and Xero apps created on or after 2 March 2026 may fail to authorize because the app still asks for Xero's broad scopes. 11d