[maxgalbu]

In the settings section for the addon, you can already input the username and password and it remembers this - is this what you mean??

yeah, i know it's possible. i was just hoping to be able to watch without opening my account if you know what i mean.
like the NHL gamecenter android app was done. no account needed just install, sign in (whithout having a valid account) and enjoy any live game.

You can watch highlights and top plays without an account, all the other things requires a valid nba league pass subscription.

If you refer to this plugin: http://forum.kodi.tv/showthread.php?tid=207041 it says in the installation instructions:

Select Gamecenter then Configure.
Enter your username and password, select Rogers if it's a Rogers login.
Go to the Home page, select Videos>Addons and login to NHL!

EDIT: you mean the android app, not the xbmc addon? I'm not sure how they do that, but since my addon is open-source software I surely don't want to put my account data in the code.