A snippet for including your composer autoloader in your /bin files.

composer-bin-autoload.php

<?php

$paths = [
    __DIR__.'/../vendor/autoload.php', // locally
    __DIR__.'/../../../autoload.php' // dependency
];
foreach ($paths as $path) {
    if (file_exists($path)) {
        require_once $path;
        break;
    }
}