Download Vonage Voice API Recordings with Golang

The Vonage API is being used to download recordings of calls made through the Voice API. To complete the task, a Vonage API account and a virtual phone number must be obtained. A webhook is sent by the API at the end of each call, containing information about the recording and a link to download it. The incoming webhook is handled by a Golang application that uses Ngrok to provide a publicly available URL for the local development platform. The application authenticates with the JWT token and downloads the recording file, saving it to disk.