Mount netdrive via fstab and keypassxc

I found many guides on how to mount a NAS drive via fstab. Quite some enter username and password right into the fstab file, others use a file .smbcredentialsfor that. I'd like to manage all my credentials with KeePassXC or some other portable database. Is there a way to tell the fstab fetching the username and password from such credential manager? My probably-a-lot-of-work-around idea was, to use some kind of [scriptfs](https://github.com/frodonh/scriptfs) (_this one seems unmaintained, but maybe there is a modern alternative_) to create a virtual filesystem, exposing a virtual file as proxy between the password store and the fstab (.smbcredentials). So any hints in this direction may be appreciated, if no simpler solution is available.