Best way to check if Client is still logged in ?

[mjavad_mllw]

what is the best way to check if my client is still logged in ?
and if the client logged out how to relogin again ?

btw i have sth like this but it does not work:

// this should relogin again but wont work
client.on("disconnected", (eresult, msg) => {
  console.log(`Disconnected from Steam: ${msg} (${eresult})`);

  setTimeout(() => {
      if (client.steamID === null) {
          try {
              client.logOn(logOnOptions);
            } catch (error) {
              console.error(error);
            }
      }
  }, 5000);
});

// the way i check if client is logged in or not
function isLoggedIn() {
  return client.steamID;
}