<?php
error_reporting(-1);
ini_set('display_errors', 'On');

function send($packet, $url) {
    $ctx = stream_context_create(
            array(
                'https' => array(
                    'header' => "Content-type: application/x-www-form-urlencoded",
                    'method' => 'POST',
                    'content' => $packet
                )
            )
    );
    return file_get_contents($url, 0, $ctx);
}

$postdata = http_build_query(
        array(
            'email' => 'ivaylo@www-you.com',
            'password' => '123456'
        )
);

var_dump(send($postdata, 'https://e-hub.eu/api/auth'));
// string(0) ""


var_dump(send($postdata, 'https://e-hub.eu/api/auth/'));
// string(0) ""