slight refactoring of principal store

Author: lennart-k

Cargo.lock

@@ -32,6 +32,7 @@ tower.workspace = true
 futures-core.workspace = true
 tower-sessions.workspace = true
 vtimezones-rs.workspace = true
+password-auth.workspace = true
 uuid = { workspace = true, features = ["serde"] }
 
 [dev-dependencies]