creation of Notifications table and migration

app/Models/Notification.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Notification extends Model
+{
+    protected $fillable = [
+        'content',
+    ];
+
+    public function users(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
+    {
+        return $this->belongsToMany(User::class, 'user_notification', 'notification_id', 'user_id');
+    }
+}