PHP header authentication

verify.php

<?php

//  POSTMAN Authorization
//  Basic Auth
//  Fill => Username & Password

$username="api-user";
$password="ajck_[99HkJC";

// phpinfo();
// print_r($_SERVER);

if ($_SERVER["PHP_AUTH_USER"]==$username && $_SERVER["PHP_AUTH_PW"]==$password)
{
  header('Content-Type: application/json; charset=utf-8');
	echo json_encode(["data"=>"Welcome"]);
}
else
{
  header('HTTP/1.0 403 Forbidden');
	echo json_encode(["data"=>"Access denied"]);
}
?>