Default smb Login Credentials

Volumio Information

Volumio Version: 2.861
Hardware: Allo Digione
DAC: Aune

This seems a simple and basic question but I’ve had no luck finding an answer. When I access Volumio via smb as a server on my Mac I’m presented the choice of connecting as a registered user or as a guest. Is there a default registered user, if so what are default credentials? If there is no default registered user is there a safe way of creating one , perhaps via SSH, without (possibly disastrously) modifying the Samba files?
Bob

You can use ‘volumio’ as a registered user with pwd ‘volumio’.