Document Browserless Authentication

Author: m1guelpf

README.md

@@ -6,12 +6,18 @@ Go CLI to fuels a Telegram bot that lets you interact with [ChatGPT](https://ope
 
 ## Installation
 
-Download the file corresponding to your OS in the [releases page](https://github.com/m1guelpf/chatgpt-telegram/releases/latest). After you extract it, copy `env.example` to `.env` and fill in your Bot's details (you'll need your bot token, which you can find [here](https://core.telegram.org/bots/tutorial#obtain-your-bot-token), and optionally your telegram id, which you can find by DMing @userinfobot on Telegram.
+Download the file corresponding to your OS in the [releases page](https://github.com/m1guelpf/chatgpt-telegram/releases/latest). After you extract it, copy `env.example` to `.env` and fill in your Bot's details (you'll need your bot token, which you can find [here](https://core.telegram.org/bots/tutorial#obtain-your-bot-token), and optionally your telegram id, which you can find by DMing `@userinfobot` on Telegram.
 
 ## Usage
 
 Run the `chatgpt-telegram` binary!
 
+## Browserless Authentication
+
+By default, the program will launch a browser for you to sign into your account. If for whatever reason this isn't possible (compatibility issues, running on a server without a screen, etc.), you can manually provide your cookie.
+
+To do this, first sign into ChatGPT on your browser, then open the Developer Tools, go to the Cookies section in the Application tab, and copy the value of the `__Secure-next-auth.session-token` cookie. Then, create a JSON file in your config dir (`/Users/[username]/Library/Application Support/chatgpt.json` in macOS, `C:\Users\[username]\AppData\Roaming\chatgpt.json` in Windows, `~/.config/chatgpt.json` in Linux), and write your cookie in the following format: `{ "openaisession": "YOUR_COOKIE_HERE" }`.
+
 ## License
 
 This repository is licensed under the [MIT License](LICENSE).