Connecting to ftp using FTPS

[saju-samuel]

const FTPS = require('ftps');

var ftps = new FTPS({
host: 'xx.xx.xxx.xx',
username: 'xxx',
password: 'xxxxxx',
protocol: 'ftps',
port: 990,
additionalLftpCommands: [
'set ssl-allow true',
'set ssl:verify-certificate no',
'set passive-mode yes'
].join(';'),
});
ftps.ls().exec(console.log);

I just tried with this code and it gave me the following error :

ls: Fatal error: SSL_connect: unknown protocol\n

Don't we need to set the requreSSH to true and sshKeyPath property also. Please advice.