curl --request GET \
  --url https://api.example.com/variables \
  --header 'Authorization: Bearer <token>'

{
  "variables": [
    {
      "id": "kSuB9Gf6aD4",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "type": "ENV",
      "value": "<string>",
      "name": "<string>"
    }
  ]
}