<?php

return [
    'listId' => '',
    'installationUrl' => '',
    'apiKey' => '',
];
<?php

return [
    // Sendy installation URL
    'installationUrl' => '',
    
    // Default list id
    'listId' => '',

    // The Sendy API Key
    'apiKey' => '',
];

Add some documentation in settings
Add some documentation in settings