diff --git a/src/main/kotlin/com/android/trisolarisserver/controller/Rooms.kt b/src/main/kotlin/com/android/trisolarisserver/controller/Rooms.kt
index 8a6284c..1b01525 100644
--- a/src/main/kotlin/com/android/trisolarisserver/controller/Rooms.kt
+++ b/src/main/kotlin/com/android/trisolarisserver/controller/Rooms.kt
@@ -164,8 +164,15 @@ class Rooms(
     fun createRoom(
         @PathVariable propertyId: UUID,
         @AuthenticationPrincipal principal: MyPrincipal?,
+        @javax.servlet.http.HttpServletResponse response: javax.servlet.http.HttpServletResponse,
+        @org.springframework.web.bind.annotation.RequestHeader(value = "X-Debug-Auth", required = false)
+        debugAuth: String?,
         @RequestBody request: RoomUpsertRequest
     ): RoomResponse {
+        if (debugAuth == "1") {
+            response.setHeader("X-Principal-Present", (principal != null).toString())
+            response.setHeader("X-Principal-Id", principal?.userId?.toString() ?: "none")
+        }
         requirePrincipal(principal)
         propertyAccess.requireMember(propertyId, principal!!.userId)