docs: update docs

Author: kenjis

docs/authentication.md

@@ -54,8 +54,6 @@ helper method provides the `auth()` command which returns a convenient interface
 used functionality within the auth libraries. This must be loaded before it can be used.
 
 ```php
-helper('auth');
-
 // get the current user
 auth()->user();
 
@@ -65,6 +63,10 @@ auth()->id();
 user_id();
 ```
 
+> **Note**
+> The `auth_helper` is autoloaded by Composer. If you want to *override* the functions,
+> you need to define them in `app/Common.php`.
+
 ## Authenticator Responses
 
 Many of the authenticator methods will return a `CodeIgniter\Shield\Result` class. This provides a consistent

docs/install.md

@@ -117,12 +117,12 @@ class Auth extends ShieldAuth
 }
 ```
 
-2. **Helper Setup** The `auth` and `setting` helpers need to be included in almost every page. The simplest way to do this is to add them to the `BaseController::initController` method:
+2. **Helper Setup** The `setting` helpers need to be included in almost every page. The simplest way to do this is to add them to the `BaseController::initController` method:
 
 ```php
 public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
 {
-    $this->helpers = array_merge($this->helpers, ['auth', 'setting']);
+    $this->helpers = array_merge($this->helpers, ['setting']);
 
     // Do Not Edit This Line
     parent::initController($request, $response, $logger);