gramjs/examples/mainjs.js

const { TelegramClient } = require("telegram");
const { StringSession } = require("telegram/sessions");

(async () => {
  console.log("Loading interactive example...");
  const apiId = -1; // put your api id here [for example 123456789]
  const apiHash = ""; // put your api hash here [for example '123456abcfghe']
  const client = new TelegramClient(new StringSession(""), apiId, apiHash, {
    connectionRetries: 3,
  });
  await client.start({
    botAuthToken: "YOUR BOT TOKEN",
  });
  console.log("You should now be connected.");
  console.log(await client.getMe());
  // USE THIS STRING TO AVOID RELOGGING EACH TIME
  console.log(await client.session.save());
})();