How to correctly create Custom Post Type with custom fields through WP REST API V2

Question

How do I correctly create a custom post type record through the wp rest api v2 with custom fields? Unable to create custom fields or update them.

I have installed the su

Answer 1

There was a glaringly obvious problem with my wordpress plugin where the add action function name did not match the actual function name register_something_random and slug_register_something_random()

add_action( 'rest_api_init', 'register_something_random' );
function slug_register_something_random() {

Should be

add_action( 'rest_api_init', 'register_something_random' );
function register_something_random() {

Made this change and all is now ok