some progress

src/handler/sern.ts

@@ -81,7 +81,9 @@ export class Handler {
         if (module?.mod === undefined) return "Unknown legacy command";
         
         if (module.mod.visibility === "private") {
-            
+           const checkTest = this.privateServers.find(({id}) => id === message.guildId!)?.test;
+           if(checkTest === undefined) return "This command has the private modifier but is not registered under Handler#privateServers";
+           
         }