The authentication mechanism to be used when connecting to the FTP server.
Possible ValuesAUTOMATIC, NONE, IMPLICIT, EXPLICIT
If SSLMode is set to NONE, default plaintext authentication is used to log in to the server. If SSLMode is set to IMPLICIT, the SSL negotiation will start immediately after the connection is established.. If SSLMode is set to EXPLICIT, the driver will first connect in plaintext, and then explicitly start SSL negotiation through a protocol command such as STARTTLS.