Connecting to the server - asks for a password

[AndreyChursin]

I can connect to a server without pass (by ssh)
I have configured this extension, but when connecting to the server it is still prompted for a password!
How can I configure it to not ask for a password at all (even the first and only time)?

{
    ....
    "protocol": "sftp",
    "port": 22,
    "uploadOnSave": false,
    "useTempFile": false,
    "openSsh": false,
    "secure": true,
    "privateKeyPath": "..."
}