Private files in D8 not accessible

The documentation for this module says "If you are using 8.x-1.0 version then you can also protect private file. This feature will going to be available soon for 7.x version." How exactly does one protect private files with this module in D8. There is no documentation and there don't appear to be any configurations for this. I tried adding the file path as a 'page' but that doesn't work either? Any guidance?