async function sendMainMenu(ctx) {
    const keyboard = [
      [
        { text: "➕ Detail Paket", callback_data: "detailserver" },
        { text: "♻️ Total Paket", callback_data: "listserver" },
      ],
      [{ text: "💳 Cek Saldo", callback_data: "cek_saldo" }],
    ];