async function existsUser(userCode){
  const response = await fetch("/api/existsUser", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-App-Token": chatToken
    },
    body: JSON.stringify({
      user_code: userCode
    })
  });
  if (!response.ok) {
    const errorData = await response.json().catch(() => ({ message: "Respuesta no válida del servidor." }));
    throw new Error(errorData.message || `Error del servidor: ${response.status}`);
  }
  const data = await response.json();
  return data;
}

export { existsUser};