Merge pull request #157 from xerosanyam/patch-2

Update README.md

Author: nicolasgarnier

quickstarts/email-users/README.md

@@ -30,11 +30,15 @@ This sample comes with a simple web-based UI which code is in [public](public) d
  1. You must have the Firebase CLI installed. If you don't have it install it with `npm install -g firebase-tools` and then configure it with `firebase login`.
  1. Configure the CLI locally by using `firebase use --add` and select your project in the list.
  1. Install dependencies locally by running: `cd functions; npm install; cd -`
+ 1. Enable access to [Less Secure Apps](https://www.google.com/settings/security/lesssecureapps) and [Display Unlock Captcha](https://accounts.google.com/DisplayUnlockCaptcha).
+ 
+ For accounts with 2-step verification enabled [Generate App Password](https://support.google.com/accounts/answer/185833).
  1. Set the `gmail.email` and `gmail.password` Google Cloud environment variables to match the email and password of the Gmail account used to send emails. For this use:
 
  ```bash
  firebase functions:config:set gmail.email="myusername@gmail.com" gmail.password="secretpassword"
  ```
+ 
 
 
 ## Deploy and test