Actually verify user credentials

auth/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [features]
 steam = ["steamworks"]
-robocraft = []
+robocraft = ["rc_core"]
 cardlife = []
 default = ["robocraft", "cardlife"]
 
@@ -18,3 +18,5 @@ uuid = { version = "1.12", features = [ "v4", "fast-rng" ] }
 steamworks = { version = "0.11", optional = true }
 hex = "0.4"
 jsonwebtoken = "9"
+clap.workspace = true
+rc_core = { version = "*", optional = true, path = "../rc_core" }