validator.php

public function rules(): array
{
    return [
        'password' => [
            'required',
            Password::min(8)->letters()->numbers()->mixedCase()
        ],
        'password_confirm' => [
            'same:password',
            'required',
        ],
        'reset_token' => [
            'required',
            'exists:MyModel::class,token'
        ]
    ];
}