Get a single supplier bill, including supplier balance and reciprocal client.
supplier_balance block aggregating the supplier’s outstanding invoices
across all your work points, plus the next due invoice (if any).
supplier, expense, client,
efactura_message, and lines by default. Pass expand= (empty) to skip
all expansions, or expand=supplier,lines to choose a subset.Use your API key (sk_live_xxx or sk_test_xxx)
Supplier bill CzUid.
Defaults to supplier,expense,client,efactura_message,lines.