RStudio Workbench default admin password

Can someone tell me what the default user_name and password is for workbench? I am not able to login when I goto http://server_name:8787/

By default Workbench uses PAM, so it does not actually create users or passwords (you will need to enter a username and password for someone who can log into server_name).

If that doesn't get you in, please get in touch with our friendly support team: support@rstudio.com

Thank you. Using linux uid/pwd and thats not working.