> cli <- D1Client()
20130305-16:26:10: [WARN]: /tmp/x509up_u501 (No such file or directory) [org.dataone.client.auth.CertificateManager]

# Right ok, so I create x509up_u501 and copy my certificate usercred.p12

 karthik@karthik-rams-macbook-pro ⮀ ~/Downloads ⮀ ls -l usercred.p12
-rw-r--r--@ 1 karthik  staff  2677 Mar  5 16:15 usercred.p12

cp usercred.p12 /tmp/x509up_u501

# Then this happens

 cli <- D1Client()
20130305-16:28:42: [WARN]: /tmp/x509up_u501 [org.dataone.client.auth.CertificateManager]