memberid_1,memberid_2
The member's unique ID number (alphanumeric). To find a
member's ID number, get the list of members for the appropriate House
or Senate. You can also use the Biographical Directory of the United
States Congress to get a member's ID. In search results, each member's
name is linked to a record by index ID (e.g.,
http://bioguide.congress.gov/scripts/biodisplay.pl?index=C001041).
Use the index ID as member-id in your request.
key
your New York Times API key; pass in, or loads from .Rprofile as
nytimes_cg_key
, or from .Renviron as NYTIMES_CG_KEY