A convenience method to take you to the CILogon download page:
"https://cilogon.org/?skin=DataONE. Logging into CILogon will allow
you to download your X.509 certificate to your local computer. Typically,
the certificate is saved in the default Globus location for certificates
(getCertLocation) and once it is there, the 'dataone'
package will use the certificate for all authenticated operations. Deleting
the certificate file is the equivalent of logging out.
downloadCert(x, ...)# S4 method for CertificateManager
downloadCert(x)
a CertificateManager instance
(Not yet used)