Retorna um curso

curl --request GET \
  --url https://memberkit.com.br/api/v1/courses/{id}

{
  "id": 123,
  "name": "<string>",
  "description": "<string>",
  "position": 123,
  "image_url": "<string>",
  "page_checkout_url": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "category": {
    "id": 123,
    "name": "<string>",
    "position": 123
  },
  "sections": [
    {
      "id": 123,
      "name": "<string>",
      "position": 123,
      "slug": "<string>",
      "description": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "lessons": [
        {
          "id": 123,
          "position": 123,
          "slug": "<string>",
          "title": "<string>"
        }
      ]
    }
  ]
}