/** The Ajah User Library provides user and account functionality. The generic terminology demands some clarification: <ul> <li><em>Users</em> are individual people who can access the system. <li><em>Accounts</em> are billing/management entities. </ul> A user may belong to zero or more accounts, and an account may have one or more users. @author Eric F. Savage @version 1.0 */ package com.ajah.user;