curl --request GET \
  --url https://api.referralful.com/v1/commissions/{id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "id": "<string>",
  "object": "commission",
  "currency": "<string>",
  "amount": 123,
  "due_at": "2023-11-07T05:31:56Z",
  "paid_at": "2023-11-07T05:31:56Z",
  "campaign_id": "<string>",
  "affiliate_id": "<string>"
}