$jwt = JWT::encode($token, $key);
        $decoded = JWT::decode($jwt, $key, array('HS256'));

<?php //Este archivo lo que hara será pintar la tabla de la tarea por factura
    require_once('../jwt/BeforeValidException.php');
    require_once('../jwt/ExpiredException.php');
    require_once('../jwt/JWT.php');
    require_once('../jwt/SignatureInvalidException.php');

    $key = "example_key";
    $token = array(
       "iss" => "http://example.org",
       "aud" => "http://example.com",
       "iat" => 1356999524,
       "nbf" => 1357000000
    );

    $jwt = JWT::encode($token, $key);
    $decoded = JWT::decode($jwt, $key, array('HS256'));
    ?>