creation of Notifications table and migration

app/Models/User.php

@@ -50,4 +50,9 @@ class User extends Authenticatable
             'password' => 'hashed',
         ];
     }
+
+    public function notifications(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
+    {
+        return $this->belongsToMany(Notification::class, 'user_notification', 'user_id', 'notification_id');
+    }
 }