Show your TOTPs and update password files

package.json

{
  "name": "totp",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "speakeasy": "^2.0.0"
  }
}

totp.js

// simple json key-value dictionary, where key is title and value is a totp-secret
// value can be also an array [secret, filename, template] to persist fresh token into file
// template should contain {{token}} placeholder to be replaced
const credentials = require('./secrets.json');

const process = require('node:process');
const finalizers = [];
process.on('SIGINT', () => {
    finalizers.forEach(cb => cb());
});

const totp = require('speakeasy');

class Generator {
    constructor(title, secret, callback) {
        this.title = title;
        this.secret = secret;
        this.callback = callback;

        this.lastToken = null;
    }

    start() {
        this._i = setInterval(() => this.gen(), 1000);
        this.gen();
    }

    stop() {
        if (this._i) {
            clearInterval(this._i);
            this._i = null;
        }
    }

    gen() {
        const token = totp.totp({secret: this.secret, encoding: 'base32'});
        if (token !== this.lastToken) {
            this.callback(token, this.title);
            this.lastToken = token;
        }
    }
}

///////////////////////////////////

const actual = {};

for (let [title, secret] of Object.entries(credentials)) {
    let filename = null;
    let template = '{{token}}\n'
    if (Array.isArray(secret)) {
        [secret, filename, template] = secret;
    }
    const generator = new Generator(title, secret, (token) => {
        actual[title] = token;
        if (filename) {
            require('fs').writeFile(
                filename,
                template.replace(/{{\s*token\s*}}/g, token),
                {flag: 'w'},
                err => err && console.error(err));
        }
        console.clear();
        console.table(actual);
    });

    generator.start();
    finalizers.push(() => generator.stop());
}