Extracting available booking slots from a calendly event

What are you trying to achieve?

i’m currently trying to extract the available time slots from a calendly event i have scheduled. i would like to extract dates and times available in a weeks time covering 3 days.

Steps taken so far

i made the request that calendly developer say to do, /event_type by making a call and then i go to make a call to (/event_type_available_times) and get an invalid parameters responce