Update readme

Author: suhaboncukcu

README.md

@@ -1,11 +1,128 @@
 # Oauth2Server plugin for CakePHP
 
-## Installation
+**!!Attention!!**
+This plugin does not support refresh token repository yet. Access tokens are usable without any
+expiration date. **use at your own risk!**
+
+**PRs are more than welcome**
+
+## How to use?
 
 You can install this plugin into your CakePHP application using [composer](http://getcomposer.org).
 
-The recommended way to install composer packages is:
+#### 1. Use composer to install 
+
+```
+composer require suhaboncukcu/Oauth2Server
+```
+
+#### 2. Load the plugin
 
 ```
-composer require your-name-here/Oauth2Server
+Plugin::load('Oauth2Server', ['bootstrap' => true, 'routes' => false]);
 ```
+
+#### 3. Create your validators
+
+**!!Attention!!** 
+
+You can find example validator classes under `vendors\suhaboncukcu\Oauth2Server\src\OauthLogic\Validators`. 
+You should copy and paste them to your desired location.
+
+#### 4. Create & Update the config file
+
+Copy & paste `vendors\suhaboncukcu\Oauth2Server\config\oauth2.php` to your config folder and update it. 
+
+#### 5. Implement end points. 
+
+```
+// in one of your controllers
+
+    // Auth endpoint 
+    public function authorize()
+    {
+        $this->autoRender = false;
+
+
+        $this->loadComponent('Oauth2Server.Oauth2');
+
+        $response = $this->Oauth2->authorize($this->request, $this->response);
+        $response = $response->withHeader('Content-Type', 'application/json');
+
+        return $response;
+    }
+    
+    // callback endpoint
+    public function code()
+    {
+        $this->autoRender = false;
+        $response = $this->response
+            ->withHeader('Content-Type', 'application/json')
+            ->withStringBody(json_encode([
+                'code' => urldecode($this->request->getQuery('code'))
+            ]));
+
+        return $response;
+    }
+    
+    // access token endpoint
+    public function accessToken()
+    {
+        $this->autoRender = false;
+
+        $this->loadComponent('Oauth2Server.Oauth2');
+
+
+        $response = $this->Oauth2->accessToken($this->request, $this->response);
+        $response = $response->withHeader('Content-Type', 'application/json');
+
+        return $response;
+    }
+    
+    
+``` 
+
+#### 6. Use middleware to secure your routes. 
+
+```
+// assuming you have a plugin named Api 
+
+//\Api\config\routes
+use Cake\Routing\RouteBuilder;
+use Cake\Routing\Router;
+use Cake\Routing\Route\DashedRoute;
+
+use League\OAuth2\Server\Middleware\ResourceServerMiddleware;
+use Oauth2Server\OauthLogic\ServerUtility;
+
+$serverUtility = new ServerUtility();
+$server = $serverUtility->getPublicServer();
+
+
+Router::plugin(
+    'Api',
+    ['path' => '/api'],
+    function (RouteBuilder $routes) use ($server) {
+
+        $routes->registerMiddleware('resourceServer', new ResourceServerMiddleware($server));
+        $routes->middlewareGroup('Oauth2Stack', ['resourceServer']);
+
+        $routes->applyMiddleware('Oauth2Stack');
+
+
+        $routes->scope('/v1', function ($routes) {
+            $routes->fallbacks(DashedRoute::class);
+        });
+
+    }
+);
+
+```
+
+### 7. Use attributes to get total control in your actions if Validators are not enough
+`$this->request->getAttributes()`
+
+
+
+
+