Hello!
https://www.slimframework.com/docs/v4/middleware/error-handling.html#new-http-exceptions
I don’t understand what to do with these classes. There are no examples. How to use them? Please help me.
Hi!
You can throw these kind of HTTP exceptions like this:
use Slim\Exception\HttpNotFoundException;
// ...
throw new HttpNotFoundException($request);
Make sure to pass the $request object.
Thanks, odan! 
But I think a lot more examples should be added to the guide than there are now. 