Fix request type (#468)

Author: benndt

src/Client/OAuth2Client.php

@@ -17,6 +17,7 @@
 use League\OAuth2\Client\Token\AccessToken;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Session\SessionInterface;
 
 class OAuth2Client implements OAuth2ClientInterface
@@ -93,13 +94,13 @@ public function getAccessToken(array $options = [])
 
         if (!$this->isStateless()) {
             $expectedState = $this->getSession()->get(self::OAUTH2_SESSION_STATE_KEY);
-            $actualState = $this->getRequestParameter('state');
+            $actualState = $this->getRequestParameter($request, 'state');
             if (!$actualState || ($actualState !== $expectedState)) {
                 throw new InvalidStateException('Invalid state');
             }
         }
 
-        $code = $this->getRequestParameter('code');
+        $code = $this->getRequestParameter($request, 'code');
 
         if (!$code) {
             throw new MissingAuthorizationCodeException('No "code" parameter was found (usually this is a query parameter)!');
@@ -170,7 +171,7 @@ protected function isStateless(): bool
     }
 
     /**
-     * @return \Symfony\Component\HttpFoundation\Request
+     * @return Request
      */
     private function getCurrentRequest()
     {
@@ -196,12 +197,12 @@ private function getSession()
     }
 
     /**
-     * @param RequestStack $request
+     * @param Request $request
      * @param string $key
      *
      * @return string|int|float|bool|null
      */
-    private function getRequestParameter(RequestStack $request, string $key)
+    private function getRequestParameter(Request $request, string $key)
     {
         if ($request->query->has($key)) {
             return $request->query->get($key);