Mount NC15 with webDAV on raspbian 9

Nextcloud version 15.0.5 :
Operating system and version raspbian 9 on ARM 64 :

hello, i’m searching for the step by step to mount my nextcloud 15 instance through webDAV on the same raspberry running nextcloud to acces and manage files but i can’t find the exact command to enter in linux terminal or GUI of raspbian 9 and proper user and password (www-data or NC instance user ?) and where to mount it ? /var or /home ?

Can i have some help please ? Thanks you already

i have finally found the answer here using qwant search engine instead of google for sure :