Add Arc CRF username spoofing

rc_auth/Cargo.toml

@@ -19,6 +19,6 @@ libfj.workspace = true
 git-version.workspace = true
 serde.workspace = true
 serde_json.workspace = true
-hex = "0.4"
+hex.workspace = true
 
 handlebars = { version = "5", features = ["dir_source"] }