Sorry to bring up an old thread. I'm trying to use a WMTS source from this URL

api.lantmateriet.se/open/topowebb-ccby/v...n=1.0.0&service=wmts

As this (free) service requires basic authentication i tried using the the format https://<username>:<password>@api.lantmateriet.se....
This seems to work in a browser but not in Reefmaster. I get a 401 not authorized error.
Is there a way to use WMTS services that require basic auth? If not,it would be great if that feature could be added. :)