Fix name of environment variable in README.md

README.md

@@ -15,7 +15,7 @@ Cloudflare will still sometimes ask you to complete a CAPTCHA, so you may need t
 
 You should not be using this ChatGPT account while the bot is using it, because that browser window may refresh one of your tokens and invalidate the bot's session. 
 
-If your OpenAI account uses Google Auth, you shouldn't encounter any of the more complicated Recaptchas — and can avoid using paid third-party CAPTCHA solving providers. To use Google auth, make sure your OpenAI account is using Google and then set IS_GOOGLE_LOGIN to true. You should also note that if your Google account uses 2FA it will not work but there is a workaround detailed [here](https://github.com/transitive-bullshit/chatgpt-api/issues/169#issuecomment-1362206780)
+If your OpenAI account uses Google Auth, you shouldn't encounter any of the more complicated Recaptchas — and can avoid using paid third-party CAPTCHA solving providers. To use Google auth, make sure your OpenAI account is using Google and then set `OPENAI_LOGIN_TYPE` to `google`. You should also note that if your Google account uses 2FA it will not work but there is a workaround detailed [here](https://github.com/transitive-bullshit/chatgpt-api/issues/169#issuecomment-1362206780)
 
 If you want to get an access token without exposing your password to this bot you can follow [how-to-get-an-access-token-for-element-riot-matrix](https://webapps.stackexchange.com/questions/131056/how-to-get-an-access-token-for-element-riot-matrix).