Add `ActivateNetworkAccessResource` in API
Add `ActivateNetworkAccessResource` in API

References agdsn/sipa#385
agdsn/pycroft,lukasjuhrich/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,agdsn/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,lukasjuhrich/pycroft,agdsn/pycroft