curl --request GET \
  --url https://api.eflow.team/v1/meta/regions \
  --header 'X-Eflow-Api-Key: <api-key>'

{
  "regions": [
    {
      "region_id": 123,
      "region_code": "<string>",
      "country_id": 123,
      "country_code": "<string>",
      "region_name": "<string>"
    }
  ]
}