replace my nicname to from pva0xd to pva

[Peter]

I've logged in with SSO and got following page:

Specify nick name for this SSO account

Pick your nick name. It is used throughout this server to avoid having your true email address everywhere. Choose carefully, as you cannot change it later without the help of the admins.

If you want to re-use an existing nick name from the time before single-sign-on was implemented you have to contact the admins now.
Nick name: (Case sensitive. Do NOT use an email address!)

Attempts to use my nick - pva failed, so I need to contact admins. After spending half an hour on oracle site I still faile to find way how to contact admins? So I've entered some temporary nickname. Now I want to change it back on my old nickname. Thank you!

[Frank Mehnert]

Done.