This value MUST be set for wodSSHTunnel to work. The SSH
protocol specification requires that login/password
information is sent during the 'handshake', so that
there is no user interaction during the login process.
Together with the Password or
PrivateKey
properties, all the information needed for successful
authorization with a remote server is stored in these
properties. No matter which authentication method is selected
(from those supported by wodSSHTunnel), you MUST supply your
login information!