How to use REST API to send user metadata?
I’m not a WP API expert. It sounds like you want to store more information than the API supports, so you will need to add an endpoint – https://developer.wordpress.org/rest-api/extending-the-rest-api/adding-custom-endpoints/ If you are doing payment processing, I assume you are using a service or plugin + service for that, so you may want your custom endpoints … Read more