Can we use SSH key instead of password in the EPM Automate command: copyToSFTP

Hi Team

I wanted to confirm if we can use SSH key instead of password in the EPM Automate command: copyToSFTP.

The syntax of command is given as:
epmautomate copyToSftp SFTP_SERVER_URL EPM_FILE_NAME username=USERNAME password=PASSWORD.

But as their is no documentation of usage of SSH key instead of password, wanted to confirm on the same.

Thanks