post https://api.pay-i.com/api/v1/categories//resources/
Additional applicable error codes:
| Code | Message |
|---|---|
| category_not_found | Category '{0}' not found |
| category_resource_not_found | Category '{0}' and resource '{1}' not found |
| invalid_custom_category | Custom categories must not be prefixed by 'system.' |
| invalid_custom_category | Invalid custom category value '{0}' |
| invalid_custom_resource | Invalid custom resource value '{0}' |