error handler change export

src/route/error_handler.ts

@@ -1,12 +1,12 @@
 import {Context, Next} from 'koa';
 
-interface ErrorFormat {
+export interface ErrorFormat {
     code: number,
     message: string,
     detail?: string
 }
 
-export class ClientRequestError implements Error{
+class ClientRequestError implements Error{
     name: string;
     message: string;
     stack?: string | undefined;