Medtronic 2090 CareLink Programmer uses a per-product username and password that is stored in a recoverable format.
https://www.cisa.gov/news-events/ics-medical-advisories/icsma-18-058-01
https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-01
https://global.medtronic.com/xg-en/product-security/security-bulletins/carelink-2090-29901.html