Backend function or retrieving option contracts.
api_instruments_options(
RH,
method = "url",
option_instrument_url = NULL,
chain_symbol = NULL,
type = NULL,
state = NULL,
strike_price = NULL,
tradability = NULL,
expiration_date = NULL
)
object of class RobinHood
(string) one of ("url", "symbol")
(string) direct url for an option contract
(string) stock symbol
(string) one of ("put", "call")
(string) one of ("active", "inactive")
(numeric) strike price
(string) one of ("tradable", "untradable")
(string) expiration date ("YYYY-MM-DD")