add_action('admin_init', function() {
    $api_key = get_option('mailgun_api_key'); // Remplacez par le nom réel de l'option
    if (current_user_can('administrator')) { // Restreindre aux admins
        echo '<div class="notice notice-warning"><p>Clé API : ' . esc_html($api_key) . '</p></div>';
    }
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