A JSON blob with the volume data. If the user has previously logged
in to Databrary via login_db(), then volume(s) that have restricted access
can be downloaded, subject to the sharing release levels on those volume(s).
Arguments
vol_id
Volume ID.
vb
Show verbose messages. (Defaults to FALSE, overwritable using option 'databraryr.vb' or environment variable 'R_DATABRARYR_VB')
rq
An httr2 request object. If NULL (the default), a new request
is generated using make_default_request(). To access restricted data,
the user must login with a specific request object using login_db().