REDCapExporter_keyring_check returns TRUE, invisibly,
as does REDCapExporter_add_api_token.
REDCapExporter_get_api_token returns the token invisibly as not to
print the value to the console by default. Still, be careful with your
token.
Arguments
keyring
a character vector identifying the name of the keyring,
defaults to "REDCapExporter"
password
This is the password for the keyring. The default is an
empty password.
project
the name of the REDCap project the API token is identified by.
user
user name to associate the token with. Defaults to
Sys.info()[["user"]].