Added logout function

application/config/packages/security.yaml

@@ -18,7 +18,9 @@ security:
             form_login:
                 login_path: login
                 check_path: login
-
+            logout:
+                path:   /logout
+                target: /
             # activate different ways to authenticate
 
             # http_basic: true

application/config/routes.yaml

@@ -1,3 +1,2 @@
-#index:
+logout:
-#    path: /
+    path: /logout
-#    controller: App\Controller\DefaultController::index