curl --request GET \
  --url https://api.hubapi.com/conversations/v3/custom-channels/{channelId}

{
  "channelDescription": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "capabilities": {},
  "channelAccountConnectionRedirectUrl": "<string>",
  "channelLogoUrl": "<string>",
  "name": "<string>",
  "id": "<string>",
  "webhookUrl": "<string>"
}