diff --git a/src/app.controller.ts b/src/app.controller.ts
index 76b80d6..6fa353a 100644
--- a/src/app.controller.ts
+++ b/src/app.controller.ts
@@ -1,16 +1,18 @@
-import { Controller, Get, Redirect } from '@nestjs/common';
+import { Controller, Get, Redirect, UseGuards } from '@nestjs/common';
 import { AppService } from './app.service';
-import { PostalClientService } from 'nestjs-postal-client';
+import { LoginGuard } from './auth/guard/login.guard';
+import { MailService } from './mail/mail.service';
 
 @Controller()
 export class AppController {
   constructor(
     private readonly appService: AppService,
-    private readonly postal: PostalClientService,
+    private readonly mailService: MailService,
   ) {}
 
   @Get()
   @Redirect('/auth/login')
+  @UseGuards(LoginGuard)
   getHello(): any {
     return;
   }
diff --git a/src/mail/mail.service.ts b/src/mail/mail.service.ts
index e9cdf88..d6e6694 100644
--- a/src/mail/mail.service.ts
+++ b/src/mail/mail.service.ts
@@ -110,8 +110,8 @@ export class MailService {
    * @returns The content of the template
    */
   private async readHtmlTemplate(templateName: string): Promise<string> {
-    return await readFile(
-      path.join(__dirname, '../..', 'mail/html', `${templateName}.hbs`),
+    return (
+      await readFile(path.join(__dirname, '../..', 'mail/html', `${templateName}.hbs`))
     ).toString();
   }
 
@@ -121,8 +121,8 @@ export class MailService {
    * @returns The content of the template
    */
   private async readTextTemplate(templateName: string): Promise<string> {
-    return await readFile(
-      path.join(__dirname, '../..', 'mail/text', `${templateName}.txt`),
+    return (
+      await readFile(path.join(__dirname, '../..', 'mail/text', `${templateName}.txt`))
     ).toString();
   }
 
@@ -132,7 +132,7 @@ export class MailService {
    * @returns The content of the template
    */
   private async fetchTemplate(templateName: string): Promise<{ html: string; text: string }> {
-    // await both promises
+    // await both promises for html and text
     const [html, text] = await Promise.all([
       this.readHtmlTemplate(templateName),
       this.readTextTemplate(templateName),