What are some examples of "authHandler" in the "connect" client method of the ssh2 npm package?

im namely looking to re-order the methods and/or remove some.

Solution

Using the documentation, I'm going to try and provide a basic example which include usage of authHandler as mentioned in your question.

// Require Client Class from ssh2
const { Client } = require('ssh2');

// Create instance of Client (aka connection)
const conn = new Client();

// Create our ready event that's called after we connect
conn.on('ready', () => {
    console.log('Client :: ready');
});

// Connect with a config object passed in the parameters
conn.connect({
    host: '192.168.100.100',
    port: 22, // SSH

    // Authentication Handler
    authHandler: function (methodsLeft, partialSuccess, callback) {

        // Code e.g. get credentials from database
    
        // Once your logic is complete invoke the callback
        // http://npmjs.com/package/ssh2#client-examples
        callback({
            type: 'password',
            username: 'foo',
            password: 'bar',
        });
    }
});

The above should provide a working example if the credentials are changed. The code can be made slightly cleaner and the calls for conn class can be chained like so:

conn.on('ready', () => {
    console.log('Client :: ready');
}).connect({ // Chained
    host: '192.168.100.100',
    port: 22, // SSH

    // Authentication Handler
    authHandler: function (methodsLeft, partialSuccess, callback) {

        // Code e.g. get credentials from database
    
        // Once your logic is complete invoke the callback
        // http://npmjs.com/package/ssh2#client-examples
        callback({
            type: 'password',
            username: 'foo',
            password: 'bar',
        });
    }
});