Captcha on costumer login (reCapcha)

[SergeyKhalyu]

Could you please tell me how to insert script?

Here is instruction from google:
1)Insert this fragment before tag </head> in HTML-code:
<script src='https://www.google.com/recaptcha/api.js'></script>
2)Insert this fragment in the end of object <form> (there you need vidget reCAPTCHA):
<div class="g-recaptcha" data-sitekey="6Ldu9BUAAdu9B4UAAAAAVXvr9P7SPCv"></div>

I was inserted fragments in following files:
1st fragment in CustomerHTMLHead.tt
2nd fragment in CustomerLogin.tt

And this actions give me no effect.