How i fill or retrive Aditional Field with API ?
Get, by default you will receive it.
fill:
$ApiUrlCust = "admin/customers/customer";
$arr = [
'additional_attributes' => [
'field_name' => 'value'
]
];
$result = $api->api_call_put($ApiUrlCust, $customer_id, $arr);
Thanks this work for me