What is the Salt value of passwords on mattermost?
Passwords are encrypted with BCrypt. In the OpenBSD references, it states as follows:
OpenBSD generates the 128-bit bcrypt salt from an arcfour (arc4random(3)) key stream, seeded with random data the kernel collects from device timings.
So in principle, there is no “set” salt value, as the salt is created from the random data collected from device timings. This would mean the salt is unique to your system.