briancell.exe deleted

(Yes I typed "briancell" instead of "braincell" on purpose)

Ok, ok, so basiclly I keep getting this error and I don't know why...

Code:

Fatal error: Declaration of ethaniccc\AltFinder\Main::onCommand(ethaniccc\AltFinder\CommandSender $sender, pocketmine\command\Command $command, string $label, array $args): bool must be compatible with pocketmine\plugin\PluginBase::onCommand(pocketmine\command\CommandSender $sender, pocketmine\command\Command $command, string $label, array $args): bool in C:\Users\schoo\OneDrive\Desktop\skyline_network\plugintest2\plugins\AltFinder\src\ethaniccc\AltFinder\Main.php on line 56
[16:59:53] [Server thread/EMERGENCY]: An unrecoverable error has occurred and the server has crashed. Creating a crash dump
[16:59:53] [Server thread/EMERGENCY]: Please upload the "C:\Users\schoo\OneDrive\Desktop\skyline_network\plugintest2\crashdumps/Mon_Mar_9-16.59.53-CDT_2020.log" file to the Crash Archive and submit the link to the Bug Reporting page. Give as much info as you can.

This is my code:

PHP:

<?php

declare(strict_types=1);

namespace ethaniccc\AltFinder;

use pocketmine\plugin\PluginBase;

use pocketmine\Server;
use pocketmine\Player;
use pocketmine\command\Command;

use pocketmine\utils\Terminal;
use pocketmine\utils\TextFormat;
use pocketmine\utils\Utils;

class Main extends PluginBase{
    
    public function onEnable(){
        $this->getLogger()->info(TextFormat::YELLOW . "Checking to see if the server is authorized...");
        $filename = 'key.txt';
        if(file_exists($filename)){
            $this->getLogger()->info(TextFormat::GREEN . "This server is authorized!");
        } else {
            $this->getLogger()->warning(TextFormat::RED . "I am sorry, but you are not allowed to use this plugin!");
            $this->getServer()->shutdown();
        }
    }
    
    public function onCommand(CommandSender $sender, Command $command, string $label, array $args) : bool {
        switch ($command->getName()){
            case "alt":
            if(empty($args[0])){
                if($sender instanceof Player){
                    $sender->sendMessage(TextFormat::RED . "Usage: /alt");
                    return true;
                } else {
                    $this->getLogger()->info(TextFormat::RED . "Usage: /alt <player>");
                    return true;
                }
            }
            if($args[0] instanceof Player){
                if($sender instanceof Player){
                    $sender->sendMessage(TextFormat::RED . TextFormat::BOLD . "Oops, this plugin is still in development lmaooooo");
                    $this->getLogger()->info(TextFormat::RED . TextFormat::BOLD . "hey idot start coding plugin");
                    return true;
                } else {
                    $this->getLogger()->info(TextFormat::RED . TextFormat::BOLD . "hey idot start coding plugin");
                    return true;
                }
            }
            break;
        }
    }
    
}

I have no idea what I'm doing wrong lmaoooo help plz now rn pls pls pls TTYTYTYTYTY
(Sorry for acting so immature lol)

 

omg omg i just figured it out i was forgetting:

use pocketmine\command\Command;
use pocketmine\command\CommandSender;
use pocketmine\command\ConsoleCommandSender;
use pocketmine\command\CommandExecutor;

omg i want to delete all my braincells omgggggg LMAOOOO

 

hehe take this

 

ikr i was such an idiot LOL

 

Waiting to see the plugin.

 

No delete your "briancells"