Nextcloud Webdav login, Wrong in the manuals (Nautilus)

I got from my provider a email with my username and password, the username is my email. I cant login into it, i never see something about that in the Manuals.

I use Nautilus on Ubuntu 16.04 and tried this:

davs://cloud.woelkli.com/nextcloud/remote.php/dav/files/lugarius@riuseup.net/

how do i login? its seems to fail becouse the "@"
is there a way of using a http understandable way to replace the @?

it works,
thanks…

why is it wrong in the Manual?