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post/tiki/v1/categories1 credit
Tiki's category tree, one level at a time, each category with its id, name, URL, depth, whether it is a leaf and HOW MANY PRODUCTS it holds. Call it with no parameters for the top-level departments; pass `parent_id` to walk down. These are the ids `category` and the `category_id` filter take. Measured: category 1789 has 5 children, and their published product counts are 75, 17, 12, 3 and 1.
Working example
Parameters
The category whose children to list, as an id or a tiki.vn category URL. Omit for the top-level departments — Tiki refuses `parent_id=0` with HTTP 400, so the root comes from its own menu instead.
Only categories whose name contains this text, case-insensitive and diacritics as typed.
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