API reference/Bank SecuritiesBank Securities InstrumentExact zero-coupon Treasury bill terms, fixed unit/price precision and issue/maturity dates.OBJECTThe Bank Securities Instrument objectExact zero-coupon Treasury bill terms, fixed unit/price precision and issue/maturity dates.POSTCreate a bank securities instrument/ledger/securities/instruments · Fresh verified non-API-key staff with ledger:securities:write required