Adding the noindex tag can prevent Google from indexing the CMS admin page.
@@ -1,6 +1,7 @@
<!doctype html>
<html lang="en-us">
<head>
+ <meta name="robots" content="noindex">
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<title>Wowchemy Content Manager</title>
Paaz CA