List, search, filter and count Clerk users via GET /v1/users and GET /v1/users/count

Documented steps

1. Send GET https://api.clerk.com/v1/users with header 'Authorization: Bearer <CLERK_SECRET_KEY>'.
2. Paginate with limit (integer greater than 0 and less than 501; default 10) and offset (default 0).
3. Sort with order_by, e.g. order_by=-created_at (default, descending) or order_by=+email_address. Sortable fields include created_at, updated_at, email_address, first_name, last_name, phone_number, username, last_active_at, last_sign_in_at.
4. Free-text search with query=<partial string>. It matches partially and case-insensitively across user id, email, phone, username, web3 wallet, first name and last name.
5. Exact-match array filters (each capped at 100 values per request): email_address[], phone_number[], username[], user_id[], external_id[], organization_id[], web3_wallet[].
6. Date-range filters take millisecond epoch timestamps: created_at_after, created_at_before, last_active_at_after, last_active_at_before, last_sign_in_at_after, last_sign_in_at_before.
7. For a total without fetching rows, call GET https://api.clerk.com/v1/users/count with the same filter params. It returns a single total and ignores limit/offset.
8. To walk the full set, loop with a fixed limit and increase offset by that limit each call until the returned array length is less than limit.
9. SDK equivalent: clerkClient.users.getUserList({ limit, offset, orderBy, query }) which returns { data, totalCount }.
10. Docs: https://clerk.com/docs/reference/backend/user/get-user-list