curl --request POST \
  --url https://api.closebot.com/agency/source/{sourceId}/custom-channels \
  --header 'Content-Type: application/json' \
  --header 'X-CB-KEY: <api-key>' \
  --data '
{
  "friendlyName": "<string>",
  "provider": "<string>",
  "uniqueId": "<string>",
  "authToken": "<string>",
  "refreshToken": "<string>",
  "expiration": "2023-11-07T05:31:56Z"
}
'

{
  "id": "<string>",
  "sourceId": "<string>",
  "friendlyName": "<string>",
  "provider": "<string>",
  "uniqueId": "<string>",
  "authToken": "<string>",
  "expiration": "2023-11-07T05:31:56Z"
}