Error: All configured authentication methods failed

Hello!

I'm trying to test out connecting to an EC2 instance with a simple script:

const { NodeSSH } = require('node-ssh')

const ssh = new NodeSSH()

ssh.connect({
  host: 'ec<some-ip>.compute-1.amazonaws.com',
  username: 'ubuntu'
}).then(function() {
  return ssh.execCommand('cd /home/ubuntu/ && ls')
}).catch(function(err) {
  console.log('error: ', err)
})

When doing so, I get the following:

Error: All configured authentication methods failed
    at doNextAuth (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/client.js:803:21)
    at tryNextAuth (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/client.js:993:7)
    at USERAUTH_FAILURE (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/client.js:373:11)
    at 51 (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/protocol/handlers.misc.js:337:16)
    at Protocol.onPayload (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/protocol/Protocol.js:2025:10)
    at ChaChaPolyDecipherBinding.decrypt (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/protocol/crypto.js:851:26)
    at Protocol.parsePacket [as _parse] (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/protocol/Protocol.js:1994:25)
    at Protocol.parse (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/protocol/Protocol.js:293:16)
    at Socket.<anonymous> (/Users/me/Desktop/code/node-ssh-test/node_modules/ssh2/lib/client.js:713:21)
    at Socket.emit (events.js:400:28) {
  level: 'client-authentication'
}

However, I am able to ssh into this server directly:

ssh ubuntu@ec<some-ip>.compute-1.amazonaws.com

Is there anything you can recommend for what might be causing the authentication methods to fail from node-ssh?

Many thanks!

The report provides a Node.js connection script and a stack trace through node_modules/ssh2/lib/client.js; start by reproducing the connection with the shown options and comparing it with the working ssh command. Done would require identifying a reproducible node-ssh authentication or configuration cause and documenting a concrete fix or guidance.