API authentication using Express

I’m attempting to issue a GET request to Yelp’s API in order to perform a simple search, however I am not able to figure out how to send the API keys in the header or the request for the purposes of authentication. I had attempted to use setHeader on the request but am receiving a syntax error for some reason. I can issue the request via POSTMAN so I know the key is correct it’s when I try to set/send the header that I run into problem.

I know there is an npm yelp module but I was trying to avoid using any other dependencies if at all possible. I reviewed the documentation and attempted with the below code but to no avail. Unsure what exactly I’m doing wrong here but I can’t find any help and have struggled with this for days. Thanks!

var express = require("express");
var app = express();
var request = require("request");

request.get('https://api.yelp.com/v3/businesses/search', function (error, response, body) {
'auth': {