Hi,
I can confirm that also for us, changing from “library” to “native” in player.cfg prevents the additional username popup from appearing (changing the setting worked fine on second try, closing any NoMachine process before so the setting isn’t overwritten). Authentication is working fine also with the “native” setting.
And yes, we are also using SSH as protocol to connect (with authentication via ssh agent), and we are making use of agent forwarding as well.
Thanks