Fix using the oauth endpoint when a project dependency

Author: DannyvdSluijs

composer.json

@@ -15,7 +15,8 @@
         "symfony/console": "^4.3",
         "symfony/filesystem": "^4.3",
         "twig/twig": "^2.11",
-        "guzzlehttp/guzzle": "^6.3"
+        "guzzlehttp/guzzle": "^6.3",
+        "symfony/http-foundation": "^4.3"
     },
     "autoload": {
         "psr-4": {