Usage
myTarAuth(
login = getOption("rmytarget.login"),
grant_type = "client_credentials",
client_id = getOption("rmytarget.client_id"),
client_secret = getOption("rmytarget.client_secret"),
agency_client_name = NULL,
code_grant = getOption("rmytarget.code_grant_auth"),
token_path = myTarTokenPath()
)