create temp class

packages/slack/src/services/register.js

@@ -0,0 +1,13 @@
+class RegisterService {
+
+  constructor(crowi) {
+    this.crowi = crowi;
+  }
+
+  hogeFunction(body) {
+    console.log(body);
+  }
+
+}
+
+module.exports = RegisterService;