This works great but it wasn’t clearly documented for non-Firebase users. I assume it will work, as well, for any of the client libraries (not just Golang). Assuming you have some (Golang) code (in this case using the Google Cloud Client Library) that interacts with a Firestore database. Something of the form: package main import ( "context" "crypto/sha256" "fmt" "log" "os" "time" "cloud.google.com/go/firestore" ) func hash(s string) string { h := sha256.