Yes. It is also need the key.
Also you must know your passphrase for key which exist in your ftp directory in people.salixos.org ~/.ssh/authorized_keys
If you have loose it. Then gapan has to send it to you or you can create another one and gapan can upload it there.
ssh djemos@people.salixos.org
Enter passphrase for key '/home/djemos/.ssh/id_rsa':
This service allows sftp connections only.
Connection to people.salixos.org closed.
sshfs djemos@people.salixos.org:/ ~/people-salix/
Enter passphrase for key '/home/djemos/.ssh/id_rsa':
is working
Note that the local folder people-salix or whatever name you mount the remote folder, has to be created and exist locally.
Also in your local folder ~/.ssh/ must exist id_rsa key otherwise remote server cannot authorize you with the key existed in ~/.ssh/authorized_keys file in remote server