firebase functions and other api

My problem is to make use of an API along with Firebase Functions, the API in question is Coinbase, I use the API with node, if I test in the terminal with the node command it works, however when I use it with Firebase Functions Does not work at all, I've been trying to solve the problem for almost a week now.

The code is as follows>

    var functions = require('firebase-functions');


    var Client = require('coinbase').Client;
    var client = new Client({
        "apiKey": "xxxxxxxxxxxx",
        "apiSecret": "xxxxxxxxxxxxxxxxxxxxxxx"
    });    


exports.helloWorld = functions.https.onRequest((request, response) => {



    this.client.getAccounts({}, function(err, accounts) {

        if(accounts){

            response.send(accounts);
         }else{
            response.send(err);

        }

    });
});

The error: https://us-central1-investimentos-b7406.cloudfunctions.net/helloWorld

The Coinbase API: https://developers.coinbase.com/docs/wallet/guides/bitcoin-wallet

via Uriel Kindermann