Where is Appointments+ hook/action for New Appointment


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)
'1 %plural% deduction for Appointment Booking'


I located this thread, but is it old and refers to a different version;