shipping-portal/app/Classes/Modules/Unity/Services/GetAccessToken.php

<?php

namespace App\Classes\Modules\Unity\Services;

use Config;
use Illuminate\Support\Facades\Http;

class GetAccessToken
{
    private $unityConfig;

    public function __construct()
    {
        $this->unityConfig = Config::get('unity');
    }

    public function execute(){

        //TODO: Cache access token base on expiry for login version

        $accesToken='';
        if($this->unityConfig['default_auth']=='login'){
            $loginDetails = $this->unityConfig['auth']['login'];
            $response = Http::post($this->unityConfig['url'].$this->unityConfig['endpoint']['login'], [
                'email' => $loginDetails['username'],
                'password' => $loginDetails['password'],
            ])->object();
            $accesToken = $response->access_token;
        }else{
            $accesToken =  $this->unityConfig['auth']['api_key']['key'];
        }

        //TODO: Throw error if access token not available

        return $accesToken;
    }
}