Well to be fair it is easy, people are using an outdated API. Every Vapi video I have seen is users using V1API which is depreciated (High Level has been saying this for 3 years) now it's finally sunset. Most people do not know this. Also
@User point - HL has made it difficult to connect to V2. My good made a free resourse to help with this
https://www.ghlapiv2.com/ Later after I get done with the day I am going to help
@User with his problem and showcase why you should not be using V1. Also even if you make your app and connect V2 to Make, you probaly still wont have access to the API you want - no company puts all their API's on any automation platform.