CODE TO PRODUCE ERROR

var client = new dwolla.Client({
        key: DWOLLA_APP_KEY,
        secret: DWOLLA_APP_SECRET,
        environment: 'sandbox',
      });

    console.log("req for iav", client);
    client.post(`https://api-sandbox.dwolla.com/customers/${CLIENT_ID}/iav-token`).then(resIAV => {
        console.log('got token', resIAV.body.token);
        res.json({token:resIAV.body.token});
    }).catch(err => {
        console.log("toekn erro", err);
    });




ERROR PRODUCED

{ FetchError: request to https://accounts-sandbox.dwolla.com/token failed, reason: getaddrinfo EAI_AGAIN accounts-sandbo x.dwolla.co m:443
    at ClientRequest.<anonymous> (/srv/node_modules/node-fetch/lib/index.js:1455:11)
    at emitOne (events.js:116:13)
    at ClientRequest.emit (events.js:211:7)
    at TLSSocket.socketErrorListener (_http_client.js:401:9)
    at emitOne (events.js:116:13)
    at TLSSocket.emit (events.js:211:7)
    at emitErrorNT (internal/streams/destroy.js:66:8)
    at _combinedTickCallback (internal/process/next_tick.js:139:11)
    at process._tickDomainCallback (internal/process/next_tick.js:219:9)
  message: 'request to https://accounts-sandbox.dwolla.com/token failed, reason: getaddrinfo EAI_AGAIN accounts-sandbox.dwolla.com:443',
  type: 'system',
  errno: 'EAI_AGAIN',
  code: 'EAI_AGAIN' }