Is there a way to contact a GitHub user to negotiate their username or organization name?a

I’m trying to reach out to a GitHub user that is holding an inactive username. Is there a known way to do that?

@uchoa

Note: The name could still be active, but with no visible activity.

If it has a public email address on their profile, use that.
I am not aware of another route for a user contacting another user directly. I guess indirectly an activity on a resource they own that may generate a notification, that they may or may mot be listening to with notifications may reach them as well…