优化 auth 单例获取用户，支持 guard 获取

extend/catcher/library/excel/ExcelContract.php

@@ -0,0 +1,14 @@
+<?php
+namespace catcher\library\excel;
+
+interface Excel
+{
+    public function title(): string;
+
+    public function headers(): array;
+
+    public function sheets(): array;
+
+    public function filename():string;
+
+}