public function missingSettings()
    {
        $missing = [];
        foreach($this->recommendedSettings() as $plugin => $settings) {
            foreach($settings as $setting) {
                /* Get value for the setting */
                $value = $_ENV[$setting] ?? null;

                if(is_null($value)) $missing[$plugin][] = $setting;
            }
        }
        return $missing;
    }