Call to undefined method Illuminate\Notifications\Notification::send() - laravel

Question

I am trying to make a notification system in my project.
These are the steps i have done:
1-php artisan notifications:table
2-php artisan migrate
3-php artisan make:notification AddPost
In my AddPost.php file i wrote this code:
<?php
namespace App\Notifications;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
class AddPost extends Notification
{
use Queueable;
protected $post;
public function __construct(Post $post)
{
$this->post=$post;
}
public function via($notifiable)
{
return ['database'];
}
public function toArray($notifiable)
{
return [
'data'=>'We have a new notification '.$this->post->title ."Added By" .auth()->user()->name
];
}
}
In my controller I am trying to save the data in a table and every thing was perfect.
This is my code in my controller:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Post;
use App\User;
//use App\Notifications\Compose;
use Illuminate\Notifications\Notification;
use DB;
use Route;
class PostNot extends Controller
{
public function index(){
$posts =DB::table('_notification')->get();
$users =DB::table('users')->get();
return view('pages.chat',compact('posts','users'));
}
public function create(){
return view('pages.chat');
}
public function store(Request $request){
$post=new Post();
//dd($request->all());
$post->title=$request->title;
$post->description=$request->description;
$post->view=0;
if ($post->save())
{
$user=User::all();
Notification::send($user,new AddPost($post));
}
return redirect()->route('chat');
}
}
Everything was good until I changed this code:
$post->save();
to this :
if ($post->save())
{
$user=User::all();
Notification::send($user,new AddPost($post));
}
It started to show an error which is:
FatalThrowableError in PostNot.php line 41: Call to undefined method
Illuminate\Notifications\Notification::send()
How can i fix this one please??
Thanks.

Answer 1

Instead of:
use Illuminate\Notifications\Notification;
you should use
use Notification;
Now you are using Illuminate\Notifications\Notification and it doesn't have send method and Notification facade uses Illuminate\Notifications\ChannelManager which has send method.

Answer 2

Using this
use Illuminate\Support\Facades\Notification;
instead of this
use Illuminate\Notifications\Notification;
solved the problem for me.
Hope this helps someone.

Answer 3

using this is better
use Notification
Instead of
use Illuminate\Support\Facades\Notification
this makes the send() not accessible [#Notification Databse]