Solved I can't find a way to attach my main file to my plugin.

Can someone help find a way to attach my main file to my plugin? I am new to this and I couldn't find any other posts on here with the same issue.
Edit: I forgot to attach the code in Main.php so here you go:

PHP:

<?php

namespace TestPlugin;
use pocketmine\plugin\PluginBase;

class MainClass extends PluginBase {
    public function onLoad() : void{
        $this->getLogger()->info("Plugin Loading");
    }
}

 

I found out why, I had included src\ in plugin.yml, and I had to change Main.php to TestPlugin.php.