MUTUALLY_EXCLUSIVE_ARGUMENTS Error During SFTP Connection

Scenario:

NetSuite currently does not support 2FA connections over SFTP connections. There is currently a defect on this topic tracked as Defect 569291 for allowing the use of two types of authentication at the same time (2FA) .

When there is a use case to send 2 types of authentication at the same time, the below code throws error MUTUALLY_EXCLUSIVE_ARGUMENTS.

var connection = sftp.createConnection({
	username: 'sftpuser',
	passwordGuid: myPwdGuid,
	keyId: 'custkeysftp_1',
	url: '192.168.0.10',
	port: 22,
	directory: 'inbound',
	hostKey: 'AAAAB3NzaC1yc2EAAAADAQABAf…..'
});

Since 2019.2 version, NetSuite started to accept the use of SSH keys for authentication.

Solution:

If the use case is to test the keys, just remove the fields related to authentication by credentials (user / password). In other words, keys replace authentication with credentials.

If the use case is to use both types of authentication as 2FA (two-factor authentication), the solution to this limitation is to use a server as a bridge.