script.js

var Twit = require('twit')
var twitter = new Twit({
    consumer_key: 'xxx',
    consumer_secret: 'xxx',
    access_token: 'xxx',
    access_token_secret: 'xxx',
    timeout_ms: 60 * 1000, // optional HTTP request timeout to apply to all requests.
    strictSSL: true, // optional - requires SSL certificates to be valid.
})

var GoogleSheets = require('google-drive-sheets');
var mySheet = new GoogleSheets('xxx');

mySheet.getRows(1, function(err, rowData) {
    console.log('Pulled in ' + rowData.length + ' rows from Google Sheets');

    for (i = 0; i < rowData.length; i++) {
        var twitterhandle = rowData[i].twitterhandle
        let specialism = rowData[i].specialism
        let handle = rowData[i].twitterhandle


		const mongo = require('mongodb').MongoClient;
		const uri = "mongodb+srv://[logindetails]@edutwitter-1-jkgue.mongodb.net/test?retryWrites=true&w=majority";
		//const uri = "http://192.168.1.150:32776";
		const client = new mongo(uri, { useNewUrlParser: true });

		client.connect(err => {
		const collection = client.db("twitterteachers").collection("teachers_test");
	       collection.find({Name: msg.Name}, {$exists: true}).toArray(function(err, doc) //find if a value exists
			{     
			    if(doc){
			        console.log("User already in the db"); // print out what it sends back
			    	}
			    else if(!doc) // if it does not 
			    	{
			        console.log("Not in the DB, should upload");
			    	}
			})
	   })
	}
})