bonecms laravel-captcha validator for hesto multi-auth login

I am using hesto/multi-auth for login.I want to add captcha for login and register.For that i am using bonecms/laravel-captcha.I Used validator for captcha on register.I need to add validator for the captcha on login Form.Where I want to add validator? How should I change my Login Controller?

For Register Form with Validator:

<div class="col-md-6">
   @captcha
   <input id="captcha" type="text" class="form-control" name="captcha">
</div>

On Register Controller
protected function validator(array $data) {
    return Validator::make($data, [
        'email' => 'required|email|max:255|unique:clients',
        'password' => 'required|min:6|confirmed',
        'captcha' => 'required|captcha',
    ]);
}

Login Form Code:

For Login Form view
<div class="col-md-6">
    @captcha
    <input id="captcha" type="text" class="form-control" name="captcha">
</div

I need to validate Captcha for login form.

via Chebli Mohamed