Calendar sharing issue

Hi there,
I have troubles to share my calendar with Google accounts : even I use the ?export at the end of the end of the link given in the Calendar app (https://cloud.indie.host/remote.php/dav/calendars/user@domain/calendar?export for exemple), I need to be logged on my IndieHosters session to be able to download the .ics .

Is there a way to share a calendar with someone else ?

Thank you

Did you manage to solve your issue?