After repeated verification, requesting https cannot be connected. The ssl certificate is wrong. Change to http and get the following response
array ( 'status' => 'Active', 'registeredname' => 'name', 'email' => 'email address ', 'serviceid' => '16', 'productid' => '11', 'productname' => 'Proxmox VE VPS For WHMCS', 'regdate' => '2024-09-12 00:00:00', 'nextduedate' => '0000-00-00', 'billingcycle' => 'One Time', 'validdomain' => 'ip domain', 'validip' => '172.29.206.97', 'validdirectory' => '/www/wwwroot/whmcs', 'md5hash' => '32a55622fb56f88e1b6e8d739146bfa5', )