yes, this is very useful,
currently traccar server knows list of users who owns a specific device. look how notifications are sent to users if a single device have any event.
but this is not implemented as a API
For feature requests you should use GitHub. I would also recommend searching if there's an existing ticket. It will increase the chances if you express interest on an existing thread.
Thank you, Anton. I have reviewed the existing tickets, so I created a new one on GitHub
It would be very useful to have a function or report that allows us to know who owns a device, that is, to whom it is assigned. The practical case is that if another administrator adds a vehicle and does not add any data corresponding to the owner, we do not know who it belongs to.
Greetings