Noonononono 😀
DAAP sharing doesn’t work like that.
Winamp is trying to access the web-administration interface, which requires a password. That’s not where your music is located, or how to access it.
To gain access to your music you need a DAAP or RSP capable program.
For Winamp, there is a plugin called ml-daap. But it is … well…quirky, to say the least. There is a thread in the add-on subforum about programs that supports DAAP / RSP.