Make d2l api calls from the command line using account creds, use this function to get the cookies

d2l-login-cookies.js

var request = require('request').defaults({jar: true})

function login(username, password, cb){
    
    request.post({
        // This is the first url sent when you press login
        url: 'https://byui.brightspace.com/d2l/lp/auth/login/login.d2l',
        form: {
            userName: username,
            password: password,
        },
        // Which immediately redirects to something else, so need to handle that
        followAllRedirects: true,
    }, function (err, res, body) {
        if (err) {return cb(err)}
        
        // That redirected page returns html which only contains javascript which changes the window.location to this url, so we need to go there for them to validate our session cookies
        var lastUrl = 'https://byui.brightspace.com/d2l/lp/auth/login/ProcessLoginActions.d2l';
        request.get(lastUrl, function(err, res, body) {
            if (err) {return cb(err)}
            
            // We are all set to use the api
            cb(null)
        })
    })
}

const USERNAME = 'cct_username'
const PASSWORD = 'cct_password'

login(USERNAME,PASSWORD,function(err){
    if(err) return console.error(err)
     
    // Now you can just do requests to the api, and the request library handles the cookies for you
    var apiEndpoint = 'https://byui.brightspace.com/d2l/api/lp/1.20/10011/groupcategories/'
    
    request.get(apiEndpoint,(err,res,body) => {
        if(err) return console.error(err)
        console.log(body)
    })
})