公式説明: https://readouble.com/laravel/8.x/ja/sanctum.html
https://laravel.com/docs/8.x/authentication
At its core, Laravel's authentication facilities are made up of "guards" and "providers". Guards define how users are authenticated for each request. For example, Laravel ships with a session guard which maintains state using session storage and cookies. Providers define how users are retrieved from your persistent storage. Laravel ships with support for retrieving users using Eloquent and the database query builder. However, you are free to define additional providers as needed for your application.
うーん、ちょっとよくわからんな。
vendor/laravel/framework/src/illuminate/Auth で処理してるのはわかるんだが、どこにイベントを追加すれば良いのか。。。
