How to retrieve BASIC-auth username value when using JDBCRealm constraint?

I have a web application that uses a JDBCRealm security constraint configured as thus in my server.xml and web.xml for the context:
http://pastebin.ca/41635 (pastebin'ed to be brief)
After a user enters their BASIC credentials, how can I retrieve the username they logged in with?
For example, I have in mind something like this that I want to display in my JSP in the application:
Welcome back, <% out.print(request.getAuthUsername()); %>!
But there doesn't seem to be a ServletRequest method in the API to get this information.
Is this possible?

Answer:
<c:out value="${pageContext.request.remoteUser}"/>

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