Describe how to use token in readme

Author: Euclécio Josias

README.md

@@ -17,6 +17,9 @@ Type your Github username: lucassabreu
 Type your Github password (won't be shown):
 ```
 
+## Using Github Token
+If you're using github token you must set the environment variable `GITHUB_TOKEN`, then the script will ignore and won't ask for your username and password
+
 Or you [install into your machine](#install) and run it directaly setting parameters (or not and it will be asked as shown before):
 
 Usage: `coderockr-way-github-setup -u githubUser -p githubPassword owner/repo`
@@ -35,4 +38,4 @@ To install into your machine just run the commands bellow, and then use the comm
 ```sh
 curl -sL "https://raw.githubusercontent.com/coderockr/coderockr-way-github-setup/master/coderockr-way-github-setup.bash" -o "/usr/local/bin/coderockr-way-github-setup"
 chmod a+x /usr/local/bin/coderockr-way-github-setup
-```
+```