To edit your ORCID profile, you should be able to log into ORCID itself. If you know the e-mail address attached to it (which may be your Pitt e-mail address), you can request a password change. 

Here is a helpful FAQ page that may help you further. The relevant information is below:

How can I sign into ORCID if I lose access to my institutional sign in account?
You can sign in using your ORCID account credentials. ORCID sign in will always be available, and you can always retrieve a password as long as you have a current email address listed in your ORCID account settings. You can also sign into ORCID using Google or Facebook accounts you have already linked to your ORCID account.

If you still have trouble, contact the ORCID team for more assistance as they may be able to manually reset your account.