Error 406 on QuickStart sample code and undefines when trying getCredentials

[akbarganey]

I get an error 406 on using the QuickStart sample code and after changing the code to put the call inside an async function,

const connection = ....
(async () => {
/* get all devices */
const devices = await connection.getDevices();
console.log(devices);
})()

The error is : { error: 406, msg: 'Authentication failed' }

If I try to use the sample code from getCredentials,

const auth = await connection.getCredentials();

console.log('access token: ', auth.at);
console.log('api key: ', auth.user.apikey);
console.log('region: ', auth.region);

I get an the following:
access token: undefined
api key: undefined
region: undefined

My code worked previously, but I have not run it recently. I am on version 3.1.1. of ewelink-api

[akbarganey]

On the seond example (getCredentials), when trying to print 'auth', I get error 403:
{ error: 403, msg: 'Sign:oauthClient enable invalid' }