Where is Appointments+ hook/action for New Appointment

Hello,

I am using mycred and would like to know the action/hook in the Appointments+ plugin that fires when an appointment is confirmed?

Below is a the code for adding/deducting of points from the user but I need the hook for Appointments+ in order to get that to fire.

if ( function_exists( 'mycred' ) ) :

$mycred = mycred();

// Remove points from a user and add a log entry (both in one function)
$mycred->add_creds(
'appointment',
$current_user->ID,
-1,
'1 %plural% deduction for Appointment Booking'
);

}

I located this thread, but is it old and refers to a different version;
https://premium.wpmudev.org/forums/topic/action-hooksfiter-to-catch-appointment-creation