Key Features LWA (Login With Amazon) auth: exchanges your long-lived refresh token for a short-lived access token at https://api.amazon.com/auth/o2/token and sends it as the ``x-amz-access-token`` bearer on the EU SP-API host (``sellingpartnerapi-eu.amazon.com``). SP-API since 2023 needs **no AWS SigV4 signing** — the access token alone authorizes the call. Order Sync (pull): a cron pulls orders created in the last 24h via ``GET /orders/v0/orders`` (paginated by ``NextToken``), fetches each order's line items via ``GET /orders/v0/orders/{id}/orderItems``, maps the buyer + lines, and resolves each line to the exact Odoo variant by SellerSKU / ASIN. Variant Listing (parent/child): each Odoo product variant is published as its own child listing item via ``PUT /listings/2021-08-01/items/{sellerId}/ {sku}`` carrying ``child_parent_sku_relationship`` (parent SKU) + ``variation_theme``; a parent listing groups them. Per-variant SKU, barcode (external_product_id), price (incl. attribute price_extra), quantity and images are sent. Idempotent: re-pushing updates instead of duplicating. Stock & Price Sync: ``PATCH /listings/2021-08-01/items/...`` updates ``fulfillment_availability`` (quantity) and ``purchasable_offer`` (price); a cron (off by default) keeps every synced variant in sync in 20-item batches. FBA Inventory: ``GET /fba/inventory/v1/summaries`` reads Amazon-held fulfillable quantities back into Odoo. Feeds: bulk ``JSON_LISTINGS_FEED`` submission via the real 3-step Feeds flow (create document → upload → enqueue) for high-volume price/stock pushes. API Logs: every API call is logged with status code, duration and an error excerpt. Test Connection: a Settings button verifies the credentials with a real ``getOrders`` call against the Türkiye marketplace.