Why doesn't instagram-private-api cookie authorization work?

Question

Node.js

Library
I am making a project using this library.
I tried to add authorization by saved cookies, but apparently I'm doing something wrong, because I continue to receive emails about authorization to my account.
Is cookie authorization correct?
Here is my code

import { IgApiClient } from '../src';
import { readFile, appendFileSync, writeFile } from 'fs';
import * as os from 'os';
import { config } from './config';

import { promisify } from 'util';

const readFileAsync = promisify(readFile);

const IG_USERNAME = config.instLogin;
const IG_PASSWORD = config.instPass;

const ig = new IgApiClient();

function fakeSave(data: object) {
  writeFile('session.txt', JSON.stringify(data), (err) => {
    if (err) throw err;
  });
  return data;
}

async function fakeExists() {
    let d = await readFileAsync('session.txt', "utf8");
    if(d){ 
      return true;
    }else{
      return false;
    }
}

async function fakeLoad() {
  let cook = await readFileAsync('session.txt', "utf8");
  return JSON.parse(cook.toString());
}

async function login() {
    // This function executes after every request
  ig.request.end$.subscribe(async () => {
    const serialized = await ig.state.serialize();
    delete serialized.constants; // this deletes the version info, so you'll always use the version provided by the library
    fakeSave(serialized);
  });
  let fe = await fakeExists();

  if (fe) {
  	console.log('FE');
    // import state accepts both a string as well as an object
    // the string should be a JSON object
    await ig.state.deserialize(await fakeLoad());
  }else{
  	console.log('LOGIN');
  	  ig.state.generateDevice(IG_USERNAME);
    await ig.account.login(IG_USERNAME,IG_PASSWORD);
  }
}
// console.log(process.argv);
(async () => {
  await login();
...
});

FE hits the console every time. That is, ig.account.login is essentially not called, but Instagram still captures authorization with each call.