Return types

exam/api/Logout/Logout.php

@@ -9,9 +9,10 @@ use Khofmann\Response\Response;
 
 class Logout extends Api
 {
-  public function post()
+  public function post(): void
   {
     $token = Request::header("token");
-    return Response::json(User::getByToken($token)->logOut());
+
+    Response::json(User::getByToken($token)->logOut());
   }
 }