Laravel authentication. How do I change the table 'users' to table 'staff'?

I am a beginner just using laravel for the first time. I adding authentication by

php artisan make:auth and adding database by php artisan migrate

But I already have an old database. I tried to change the database from table 'users' to table 'staff' according to the code below.

config/auth.php

    'providers' => [
    'staff' => [
        'driver' => 'eloquent',
        'model' => App\User::class,
    ],

Found an error in Figure 1

Note I make a database table 'staff' like database table 'users'

Is there any file that I need to fix?

1

via Chebli Mohamed