List seller asks
GET /v1/sellers/{id}/asks
Returns the active asks owned by one seller.
Auth: X-Seller-API-Key. The key must belong to the {id} in the path.
The response has an asks array. Each ask contains ask_id, model_id,
region, decimal-string price, original capacity, unfilled remaining,
created_at, and expires_at.
curl -s https://aispotmarket.com/market/api/v1/sellers/SELLER_ID/asks \
-H "X-Seller-API-Key: $SPOT_SELLER_KEY"
Create an ask with POST /v1/sellers/{id}/asks and
cancel its unfilled remainder with
DELETE /v1/sellers/{id}/asks/{ask_id}.