danhstevens/_auth.php

## _auth.php
<?php

$appCode  = "YOUR_APP_CODE";
$apiKey = "YOUR_API_KEY";

$post = array('fingerprint' => $_POST['fingerprint'], 'apikey' => $apiKey);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"https://api.kickbox.io/v2/authenticate/" . $appCode);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$output = curl_exec ($ch);
curl_close ($ch);

header('Content-type: application/json');
echo $output;

## index.html
<!doctype html>
    <head>
        <title></title>
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="stylesheet" href="css/bootstrap.min.css">
        <link rel="stylesheet" href="css/bootstrap-theme.min.css">
        <link rel="stylesheet" href="css/main.css">
    </head>
    <body>

  <div class="container">
   <form class="form-inline" id="form">
	  <div class="form-group">
	    <label class="sr-only" for="email">Email</label>
	    <input type="input" class="form-control" id="email" placeholder="Email">
	  </div>
	  <button type="submit" class="btn btn-primary" id="subBtn">Submit</button>
	</form>

    <div id="tracker"></div>
  </div>

        <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
        <script>window.jQuery || document.write('<script src="js/vendor/jquery-1.11.2.min.js"><\/script>')</script>
        <script src="js/vendor/bootstrap.min.js"></script>
        <script type="text/javascript" src="https://kickbox.io/authenticate/1/release.js"></script>
        <script src="main.js"></script>
    </body>
</html>

## main.js
$('#form').submit(function(e) {
	e.preventDefault(); // Stop browser form submission

	var appCode = "YOUR_APP_CODE_HERE";
	var email   = $('#email').val();

	Kickbox.fingerprint({
		app: appCode,
		email: email,
		onSuccess: function(fingerprint) {
		  $.post("_auth.php", {
		    email: email,
		    fingerprint: fingerprint
		  }, function(data){
		  	console.log(fingerprint, data);


		    Kickbox.track({
			  app:        appCode,
			  token:      data.track_token,
			  element:    $('#tracker')[0],
			  onProgress: function(response) {console.log(response);},
			  onSuccess:  function(response) {console.log(response);},
			  onFailure:  function(response) {console.log(response);},
			  onError:    function(error)    {console.log(error);}
			});

		  });
		},
		onError: function(error) {
			console.log(error.code);
		}
	});
});
	<?php

	$appCode = "YOUR_APP_CODE";
	$apiKey = "YOUR_API_KEY";

	$post = array('fingerprint' => $_POST['fingerprint'], 'apikey' => $apiKey);
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL,"https://api.kickbox.io/v2/authenticate/" . $appCode);
	curl_setopt($ch, CURLOPT_POST, 1);
	curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

	$output = curl_exec ($ch);
	curl_close ($ch);

	header('Content-type: application/json');
	echo $output;
	<!doctype html>
	<head>
	<title></title>
	<meta name="description" content="">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="css/bootstrap.min.css">
	<link rel="stylesheet" href="css/bootstrap-theme.min.css">
	<link rel="stylesheet" href="css/main.css">
	</head>
	<body>

	<div class="container">
	<form class="form-inline" id="form">
	<div class="form-group">
	<label class="sr-only" for="email">Email</label>
	<input type="input" class="form-control" id="email" placeholder="Email">
	</div>
	<button type="submit" class="btn btn-primary" id="subBtn">Submit</button>
	</form>

	<div id="tracker"></div>
	</div>

	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
	<script>window.jQuery \|\| document.write('<script src="js/vendor/jquery-1.11.2.min.js"><\/script>')</script>
	<script src="js/vendor/bootstrap.min.js"></script>
	<script type="text/javascript" src="https://kickbox.io/authenticate/1/release.js"></script>
	<script src="main.js"></script>
	</body>
	</html>
	$('#form').submit(function(e) {
	e.preventDefault(); // Stop browser form submission

	var appCode = "YOUR_APP_CODE_HERE";
	var email = $('#email').val();

	Kickbox.fingerprint({
	app: appCode,
	email: email,
	onSuccess: function(fingerprint) {
	$.post("_auth.php", {
	email: email,
	fingerprint: fingerprint
	}, function(data){
	console.log(fingerprint, data);


	Kickbox.track({
	app: appCode,
	token: data.track_token,
	element: $('#tracker')[0],
	onProgress: function(response) {console.log(response);},
	onSuccess: function(response) {console.log(response);},
	onFailure: function(response) {console.log(response);},
	onError: function(error) {console.log(error);}
	});

	});
	},
	onError: function(error) {
	console.log(error.code);
	}
	});
	});