Refactor code for improved readability and consistency

- Removed unnecessary blank lines in various files to enhance code clarity.
- Updated comments for consistency and clarity across multiple classes and methods.
- Adjusted spacing in test files for better formatting and readability.

app/Http/Controllers/Api/V1/AuthController.php

@@ -15,7 +15,7 @@ class AuthController extends Controller
 {
     /**
      * Guest token (walk-in-user)
-     * 
+     *
      * Use when user visits website/app for the first time, and save the token in cache.
      */
     public function guestToken(): JsonResponse
@@ -28,8 +28,8 @@ class AuthController extends Controller
 
     /**
      * Register user
-     * 
-     * Register a new user and send a verification code to their phone number. Then make another request to verification route. 
+     *
+     * Register a new user and send a verification code to their phone number. Then make another request to verification route.
      */
     public function register(AuthRegisterRequest $request): JsonResponse
     {
@@ -46,7 +46,7 @@ class AuthController extends Controller
 
     /**
      * Login
-     * 
+     *
      * Send a verification code to the phone number. Then make another request to verify route.
      */
     public function login(AuthLoginRequest $request): JsonResponse
@@ -62,7 +62,7 @@ class AuthController extends Controller
 
     /**
      * Verify the code
-     * 
+     *
      * After verification, bearer token will be returned.
      */
     public function verify(AuthVerifyRequest $request): JsonResponse