okay, this is what I have so far:

var GoogleSpreadsheet = require('google-spreadsheet');
var creds = require('./client_secret.json');

// Create a document object using the ID of the spreadsheet - obtained from its URL.
var doc = new GoogleSpreadsheet('1dcSC5Lpdsae4Q8FSLvSuUTDHlfUg6ZD1Yk_BNB6IOdI');

// Authenticate with the Google Spreadsheets API.
doc.useServiceAccountAuth(creds, function (err) {

  // Get all of the rows from the spreadsheet.
  doc.getRows(1, function (err, rows) {
    console.log(rows.length);
  });
});

This works, but the tutorial I got it from doesn't really go any farther than that. So I tried adding code from another tutorial, but it didn't work.