Using GET calls to services endpoint user works with list containing all services for specified environment. User can request whole list, specific service, or specific attribute of specific service using tree traversing. To request specific service user should add to endpoint part with service id, e.g.: /environments/<id>/services/<service_id>. For selection of specific attribute on service, simply appending part with attribute name will work. For example to request service name, user should use next endpoint: /environments/<id>/services/<service_id>/name
