manually handle storing session in file

index.js

@@ -1,14 +1,30 @@
 import fetch from 'node-fetch';
 import { TelegramClient, Api as TgApi } from 'telegram';
-import { StoreSession } from 'telegram/sessions/index.js';
+import { StringSession } from 'telegram/sessions/index.js';
 import 'dotenv/config';
 import prompt from 'prompt';
+import fs from 'fs/promises';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 const apiId = parseInt(process.env.API_ID);
 const apiHash = process.env.API_HASH;
 const songPrefix = process.env.SONG_PREFIX || "";
 
-const sessionStore = new StoreSession("tg_session");
+const sessionFile = path.join(__dirname, 'tg_session', 'session');
+
+let sessionStore = new StringSession("");
+try {
+	const readSession = await fs.readFile(sessionFile, "utf8");
+	if (readSession) {
+		sessionStore = new StringSession(readSession);
+	}
+} catch (e) {
+	console.error(e);
+}
 
 async function getCurrentSong() {
 	return fetch('https://multi-scrobbler.riksolo.com/api/status').then((data) => {
@@ -75,6 +91,8 @@ async function initTelegram() {
 	// save the session so we don't have to log in every time
 	client.session.save();
 
+	await fs.writeFile(sessionFile, sessionStore.save());
+
 	return client;
 }