[libvirt-users] Libvirt libssh2 authentication

Hi, I am working on a java application using libvirt java API (version 0.4.7) and i would like to authenticate through ssh within my application (no need for the user to type his password). How can i submit SSH authentication credentials to libvirt? I am trying to get it working using libssh2 callback, but i get the error: "SSH transport error: no suitable method to retrieve authentication credentials" before anything happens. I have the same error running "virsh -c qemu+libssh2://username@host/system list" command. What is the right way to get the ssh connection working from the java code? regards, David