add this to composer.json and run composer update"

   "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/arvinlp/smm-sdk"
        }
    ],
  "require": {
    ...
    "arvinlp/smm-sdk": "@dev",
     ...
    }

php artisan vendor:publish --provider="Arvinlp\SmmSDK\SmmSDKServiceProvider" and add to .env

SMM_SDK_URL=YOURAPIURL
SMM_SDK_KEY=YOURAPIKEY