Invalid session token npm API - node.js

Question

I'm using this api to login to web.spaggiari.eu but when I try to do so it appears this error: "Unhandled rejection Error: Invalid session token".
Also this error appears below:
** at request.then.res (C:\Users\Marian\node_modules\ClassevivaAPI\index.js:28:26)
at tryCatcher (C:\Users\Marian\node_modules\bluebird\js\release\util.js:16:23)
at Promise._settlePromiseFromHandler (C:\Users\Marian\node_modules\bluebird\js\release\promise.js:512:31)
at Promise._settlePromise (C:\Users\Marian\node_modules\bluebird\js\release\promise.js:569:18)
at Promise._settlePromise0 (C:\Users\Marian\node_modules\bluebird\js\release\promise.js:614:10)
at Promise._settlePromises (C:\Users\Marian\node_modules\bluebird\js\release\promise.js:693:18)
at Async._drainQueue (C:\Users\Marian\node_modules\bluebird\js\release\async.js:133:16)
at Async._drainQueues (C:\Users\Marian\node_modules\bluebird\js\release\async.js:143:10)
at Immediate.Async.drainQueues (C:\Users\Marian\node_modules\bluebird\js\release\async.js:17:14)
at runCallback (timers.js:789:20)
at tryOnImmediate (timers.js:751:5)
at processImmediate [as _immediateCallback] (timers.js:722:5)**
This is where the error occours:
request(req)
.then(res => {
var result = {};
var cookies = parseCookies(res.caseless.dict['set-cookie']);
if (cookies.PHPSESSID) {
result.sessionId = cookies.PHPSESSID;
} else throw new Error('Invalid session token');
if (res.body.data.auth.verified && res.body.data.auth.loggedIn) {
return new Session(result.sessionId)
} else throw new Error(res.body.error[0] || res.body.data.auth.errors[0] || 'Failed to authenticate')
})
Note: I have changed the "uri" that is the link where it will do the request in the index.js file because the previous one thrown a 503 error.