curl --request GET \
  --url https://api.payvessel.com/api/v1/esim/regions \
  --header 'api-key: <api-key>' \
  --header 'api-secret: <api-key>'

{
  "status": true,
  "message": "<string>",
  "data": [
    {
      "code": "<string>",
      "name": "<string>",
      "region_type": 123,
      "sub_locations": "<array>"
    }
  ]
}