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

{
  "id": "<string>",
  "name": "<string>",
  "start_time": "<string>",
  "end_time": "<string>",
  "points_multiplier": 123,
  "description": "<string>",
  "image_url": "<string>"
}