get_instruments_cusip: Get Instruments by Cusip
Description
Given the tokens object from the `get_authentication_tokens`
function and a cusip, return a data frame with information
about the security matching the search.
Usage
get_instruments_cusip(tokens, cusip_id)
Value
Returns a data frame containing information surrounding
the cusip of interest in the search.
Arguments
- tokens
tokens object from `get_authentication_tokens` function (list).
- cusip_id
cusip of the security to be searched on (string).