Returns the account's invoices as shown on the Invoices page in the portal, newest first, with number, date, billing period, amount and status (new, published, partially_paid, paid, …). Without time_range the last week is returned (last 3 months for accounts invoiced with monthly usage summaries); a range can span at most 1 year. Accounts with separate Voice and SMS balances can narrow the list with account. document_available tells whether the invoice document can be downloaded in the portal; for monthly usage summaries payment_demand_open tells whether an unpaid payment demand is outstanding. Pagination is by page and per_page (default 100, max 1000).