How to remove TypeError: "x" is not a function? - node.js

Question

I am trying to learn how to make a discord bot and pull data from this API called Ergast (http://ergast.com/mrd). I found this npm (https://github.com/estevE11/f1-stats) which uses NodeJS implementation to get a historical record of F1 data from Ergast API. Sorry for the bad wording I am still trying to learn the lingo.
I followed what was stated in the npm documentation for installing it and tried using the example to get data from the API. However when I run the code in index.js I get the error "TypeError: "x" is not a function". When I go into the node_modules "f1-stats" folder and run the code from main.js I do get the correct result.
index.js:
const client = new Discord.Client(); //This will be our client
const { prefix, token } = require('./config.json');//const PREFIX = '!';
const f1s = require('f1-stats');
//module.exports.f1s = f1s; //Still causes the TypeError
f1s("2008 drivers", (res) => {
console.log(res);
});
The error message I get in index.js:
f1s("2008 drivers", (res) => {
^
TypeError: f1s is not a function
at Object.<anonymous> (C:\Users\RyanPC\Documents\DiscordBot\index.js:8:1)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
node_modules/f1-stats/main.js:
const f1s = require("./f1-stats"); // "./" is used because module is located in the same folder as the Node.js file
f1s("2008 drivers", (res) => {
console.log(res);
});
when I run it in node_modules/f1-stats/main.js:
{ MRData:
{ xmlns: 'http://ergast.com/mrd/1.4',
series: 'f1',
url: 'http://ergast.com/api/f1/2008/drivers.json',
limit: '30',
offset: '0',
total: '22',
DriverTable: { season: '2008', Drivers: [Array] } } }

Answer 1

Because f1-stats doesn't export anything so when you import it. It is empty. The correct file you need to import is f1-stats/f1-stats.
const f1s = require('f1-stats/f1-stats');

Answer 2

try importing f1s properly , you are getting error because you have not imported the function properly , in other words...check what is being exported from what are you trying to import....hope it solves the problem.