$_SESSION['upw'] for Sub-Account

[ghost_amm]

How can I generate the password hash (upw) of login for a sub-account?

I tried to do this in whmcs 5.0.3:

$_SESSION[ 'upw' ] = md5( $userid . $userpassword . $_SERVER['REMOTE_ADDR']);

$_SESSION[ 'uid' ] = $userid;

$_SESSION[ 'cid' ] = $contactid; /* sub-account id*/

 

However, this did not work.