title: how to add captcha to Laravel 5.1 login?
body: <p>How can I add captcha/Google-reCaptcha to user auth login? there is only validation for register that I can modify, how can I modify validation for login?</p>
  
  <p>my problem is not how to add recaptcha, my problem is how to add recaptcha validattion to login validation rules.</p>