get player id with middleware, not session

serve/session.go

@@ -61,7 +61,7 @@ func WithSession(sessions player.RowQuerier) func(http.Handler) http.Handler {
 	}
 }
 
-// Session returns the session ID set by WithSession in the request context.
-func Session(ctx context.Context) player.Session {
-	return value[player.Session](ctx)
+// ReqPlayer returns the session ID set by WithSession in the request context.
+func ReqPlayer(ctx context.Context) player.ID {
+	return value[player.ID](ctx)
 }