node-mysql callback is not a function

So i've been searching around the website for a soultion and came across something that has worked for a user previously and tried to copy how it was done just to test out using a callback function to return a result from a query would work, but I'm having problems. Here's my code

dbfunctions.js

   const connection = require('../helpers/connection');

   function getUserInfo(userID, dynamicField, callback) {
    var query = connection.query("SELECT * FROM subgutter WHERE name = 'random'");
    query.on('result', function(row) {
        callback(null, "row.dynamicField");
    });
  };

module.exports = getUserInfo();

g.js

const express = require('express');
const router = express.Router();
const connection = require('../helpers/connection');
const dbfunctions = require('../helpers/dbfunctions.js');

 dbfunctions.getUserInfo(8, "test", function(err, result) {
    console.log(err || result);
});

this is giving me in dbfunctions.js callback is not a function

via Tony