Update Readme

README.md

@@ -8,5 +8,34 @@ This is a Wrapper for [Spotify Web API PHP](https://github.com/jwilsson/spotify-
 
 
 ## Requirements
-* PHP 7.1 or later.
-* PHP [cURL extension](http://php.net/manual/en/book.curl.php) (Usually included with PHP).
+* PHP 7.2 or later.
+* PHP [cURL extension](http://php.net/manual/en/book.curl.php) (Usually included with PHP).
+
+
+## Start
+
+Add ENV-Variable:
+
+CLIENT_ID = ###my_client_id###  
+CLIENT_SECRET = ###my_client_secret###  
+REDIRECT_URI = ###my_redirect_uri###  
+REFRESH_TOKEN = ###my_refresh_token###  
+
+You can set the Env-Variable with this packages: [PHP dotenv](https://github.com/vlucas/phpdotenv) or [Symfony DotEnv](https://github.com/symfony/dotenv) 
+or manual in your application `$_ENV['CLIENT_ID']=CLIENT_ID`
+
+#### Factory 
+
+Factory-Class `SpotifyApiConnectFactory` give you access to main function
+
+First you should set `CLIENT_ID`, `CLIENT_SECRET`, `REDIRECT_URI` ENV-Variable.  
+REDIRECT_URI is you application URL  
+
+For Redirect-Url pleas use this class: `SpotifyApiConnect\Application\SpotifyWebApiPhp\Session`   
+-> Factory: `(new SpotifyApiConnectFactory)->createSpotifyApiAuth()`   
+
+
+Here is a Symfony example: <https://github.com/wesolowski/symfony-spotify-playlist-update/blob/master/src/Component/Token/Communication/Controller/Token.php> 
+
+When you get a Refresh Token pleas save this in `$_ENV['REFRESH_TOKEN']`
+