call() public static method

public static call ( $data )
<?php

require __DIR__ . '/../../vendor/autoload.php';
use opensrs\OMA\Authenticate;
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    require_once dirname(__FILE__) . '/../..//opensrs/openSRS_loader.php';
    $callArray = array('token' => $_POST['token'], 'session_token_duration' => $_POST['session_token_duration'], 'fetch_extra_info' => $_POST['fetch_extra_info'] ? true : false, 'generate_session_token' => $_POST['generate_session_token'] ? true : false);
    $callArray = array_filter($callArray);
    // Open SRS Call -> Result
    $response = Authenticate::call($callArray);
    // Print out the results
    echo ' In: ' . json_encode($callArray) . '<br>';
    echo 'Out: ' . $response;
} else {
    ?>

<?php 
    include 'header.inc';
    ?>
<div class="container">
<h3>authenticate</h3>
<form action="" method="post" class="form-horizontal" >
	<h4>Optional</h4>
	<div class="control-group">
	    <label class="control-label">Fetch extra info</label>
	    <div class="controls"><input type="checkbox" name="fetch_extra_info" value="true"></div>
	</div>
	<div class="control-group">
	    <label class="control-label">Generate session token</label>
	    <div class="controls"><input type="checkbox" name="generate_session_token" value="true"></div>
	</div>