Why can packages and their folders not be loaded in Laravel?

Question

Laravel

Part 1: I
had to create my own validation rules. I decided to do this through the class-successor ( here is the subtitle "Extending The Validator Class"). Accordingly, I created the /app/validators folder, put the class file there and added this folder to /composer.json. Next, I did artisan dump-autoloadand composer dump-autoload. However, my file stubbornly did not load. I also added the folder to the ClassLoader::addDirectories array in the /app/start/global.php file, repeated the commands, but nothing was loaded yet.
After that, I called that file UserValidators.php, put it in /app/models, from where the files are definitely loaded, but my file stubbornly did not load.
Part 2:
I needed to add the TwitterOAuth library to my project. To do this, I decided to use packages, following every letter of this instruction , except for replacing the names and code of the library with my own. However, I was met with the same problem as with loading folders. Every time I try to do dump-autoload, they tell me that my class was not found, that is, the file is stubbornly not loaded, although the system 100% sees some kind of package.
I'm already giving up, I've googled everything possible, tried everything, but it doesn't work. Has anyone encountered the same?
Update:
I poked around composer and found that my validators folder is included in the upload array, but it doesn't load at all...

Answer 1

In general, I created a ServiceProvider for my validator and it worked. I also began to use namespaces everywhere and Laravel very cheerfully picked up absolutely everything and everything is fine now.

Answer 2

Pack it in an archive and put it on some Yandex disk, it's interesting to see, I've never encountered such a problem. Maybe it's a matter of rights or ways.

Answer 3

And please write how you include the file in composer.json.