PROPFIND request does not return correct data

[Pirogano]

Hello all,

I want to write a carddav client for my raspberry pi that connects to my baikal server and gets certain data from the contacts that are stored there in my address book. Baikal Server is running on my NAS and I'm using Python3 on the raspberry with the requests library. I want to use the PROPFIND request to get information form the baikal xerver but never get a 207 status back with the requested data. Instead I get a 401 status which points into the direction of missing access rights.

For the PROPFIND I use the following:
auth: the credential of the baikal user (not the admin)
URL: http://my.nas.server/baikal/html/dav.php/addressbooks/baikal_user/name_of_addressbook

When I use
http://my.nas.server/baikal/html/dav.php
in my webbrowser I get valid response (after authentification with the baikal user credentials)

Any help is highly appreciated
Thanks
Pirogano