"Not Logged In" at Send trade

[Laucian]

Lately, I've been having this error when i try to send a trade, but it doesnt happend always, only one or twice a day for example.

Why does this happen?

 

A piece of my code:

var trade = offers.createOffer(steamid);

trade.addTheirItems(pooluser);
trade.setToken(token);
trade.send(function (err, status){
   if (err) {
      console.log(err);
   } else {
      console.log("Offer sent");
      console.log(status);
   }
});

Edited January 18, 2017 by Laucian

[Dr. McKay]

That means that your session has expired, and you need to login again.

[Laucian]

So, how i can check if session has expired before i send a trade?

[Dr. McKay]

You shouldn't need to. Try to send the trade. If your session has expired, relog and then send it again.