my node.js source :    client.getEncryptedAppTicket(appid,null, function(err, ti){   console.log(err);   console.log(ti);  });   result :     { Error: Fail     at Object.exports.eresultError (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\components\helpers.js:73:12)     at C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\components\appauth.js:20:21     at Object.cb (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\components\messages.js:160:4)     at CMClient._netMsgReceived (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\node_modules\steam-client\lib\cm_client.js:321:26)     at CMClient.handlers.(anonymous function) (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\node_modules\steam-client\lib\cm_client.js:603:8)     at CMClient._netMsgReceived (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\node_modules\steam-client\lib\cm_client.js:305:24)     at emitOne (events.js:96:13)     at TCPConnection.emit (events.js:191:7)    at TCPConnection._readPacket (C:\Users\JaeWon\Desktop\node-steam-user-master\node-steam-user-master\node_modules\steam-client\lib\tcp_connection.js:179:7)     at emitNone (events.js:86:13) eresult: 2 } undefined    can u help me?