AppTicket Err: Access Denied

[DANG1172]

Could i have some help with the Access denied error when using getEncryptedAppTicket
The problem i am having is that getEncryptedAppTicket returns Access Denied

Also clientSteam.accountName returns undefined

even though  clientSteam.steamID is returning a Valid User ID

Code Below:

clientSteam.logOn({

'accountName': username,

'password': password

});

 

clientSteam.on('loggedOn', details => {

console.log('[Steam]: Signed into Steam as ' + clientSteam.steamID + '.' + ' ' + clientSteam.accountName );

 

 

clientSteam.getEncryptedAppTicket(AppId, null, (err, ticket) => {

if (err) {

console.log("[Steam]: AppTicket error: " + err);

return;

}

 

[Dr. McKay]

Do you own the app in question?

accountName is not a valid property of SteamUser objects, so that should expectedly be undefined.