How can to fix Interface "App\Illuminate\Contracts\Auth\Aunthenticatable' not found" in laravel

this my code :

use Illuminate\Database\Eloquent\Model;

use Illuminate\Auth\Authenticatable;

class Admin extends Model implements Illuminate\Contracts\Auth\Aunthenticatable { use Authenticatable;

}

but it said "App\Illuminate\Contracts\Auth\Aunthenticatable not found"

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