Returns {@code true} if this Subject/user proved their identity <em>during their current session</em>
by providing valid credentials matching those known to the system, {@code false} otherwise.
<p/>
Note that even if this Subject's identity has been remembered via 'remember me' services, this method will
still return {@code false} unless the user has actually logged in with proper credentials <em>during their
current session</em>. See the {@link #isRemembered() isRemembered()} method JavaDoc for more.
@return {@code true} if this Subject proved their identity during their current session
by providing valid credentials matching those known to the system, {@code false} otherwise.
Returns {@code true} if this Subject/user proved their identity <em>during their current session</em> by providing valid credentials matching those known to the system, {@code false} otherwise. <p/> Note that even if this Subject's identity has been remembered via 'remember me' services, this method will still return {@code false} unless the user has actually logged in with proper credentials <em>during their current session</em>. See the {@link #isRemembered() isRemembered()} method JavaDoc for more.
@return {@code true} if this Subject proved their identity during their current session by providing valid credentials matching those known to the system, {@code false} otherwise.