Comment 13 for bug 1895353

What must be changed to use it?
I get
BackendException: ssh connection to usr@backup:23 failed: Authentication failed.
when I change
--ssh-options="-i /etc/ssh/ssh_host_rsa_key" pexpect+sftp://user@backup:23
to
--ssh-options="-i /etc/ssh/ssh_host_rsa_key" paramiko+sftp://user@backup:23