Your username may be your domain name without the '.EDU' ending.
The Whois Lookup database contains only .edu domains and is the authoritative source for the .edu domain. The data in the EDUCAUSE Whois Lookup database is provided by EDUCAUSE for informational purposes in order to assist in the process of obtaining information about or related to .edu domain registration records.
By submitting a Whois query, you agree that this information will not be used to allow, enable, or otherwise support the transmission of unsolicited commercial advertising or solicitations via email. The use of electronic processes to harvest information from this server is generally prohibited except as reasonably necessary to register or modify .edu domain names.
To perform a Whois lookup search, please type in the desired domain name with a ".edu" at the end (for example "myinstitution.edu") and click "search"