create created model event and adding role and permission seeder

app/Models/Permission.php

@@ -6,5 +6,17 @@ use Spatie\Permission\Models\Permission as Model;
 
 class Permission extends Model
 {
-  // 
+  /**
+   * @inheritdoc
+   */
+  public static function boot()
+  {
+    parent::boot();
+
+    static::created(function (Permission $permission) {
+      if ($role = Role::where('name', 'superuser')->first()) {
+        $role->permissions()->attach([$permission->id]);
+      }
+    });
+  }
 }