competitiion little riddle with php and JS

[27]

need a little help for a competition but im bad at phpand webserver shit. 

how can i fix this? speed is impportant atm :D 

<?php

// Welcome to the next step. You will be exploiting the vulnerable in this authentication script.
// Hosted here also: https://auth.autodidactbots.xyz/challenge

$json = file_get_contents('php://input');
$data = json_decode($json, true);

$password = '14ofQrct98a';
$received_password = $data['password'];

if ($password == $received_password && md5($received_password) !== md5($password)) {
       echo 'Access Granted'; //final request must go to server, it will have a secret response.
   } else {
       echo 'Access Denied';
}

?>


thanks in advance!