how to use password to communicate with sftp by using curl

Question

this is from question - [question]: Password SSH authentication method in RCurl

but the problem is, I don't have access to the server, so I cannot use publickey to work with.

and curl says SSH authentication methods available: password,publickey

I assume I should be able to use password as method

and I'm able to use FileZilla and WinScp to talk with server

any help will be appreciated.