Spring Security returning guest instead of UserDetails for Authentication.getPrincipal()

I'm trying to implement spring security 3.1.0.M1 and I'm unable to get my application to set the Authentication.getPrincipal to my custom UserDetails implementation. It always returns a principal of "guest" when I try to get the logged in user. See getLoggedInUser method below.

In Users.java (UserDetails impl) the getAuthorities method never gets called and maybe that's why the user_role doesn't get assigned.

to Maybe I've misconfigured something...I've attached an outline of my implementation hoping someone can spot my error. Thanks for the assistance!

public static Users getLoggedInUser() {
    Users user = null;
    Authentication auth = SecurityContextHolder.getContext().getAuthentication();
    if (auth != null && auth.isAuthenticated()) {
        Object principal = auth.getPrincipal();
        if (principal instanceof Users) {
            user = (Users) principal;
        }
    }
    return user;
}

security context file(removed the xml and schema definitions):

<global-method-security secured-annotations="enabled"&g开发者_JAVA技巧t;
</global-method-security>
<http security="none" pattern="/services/rest-api/1.0/**" />
<http security="none" pattern="/preregistered/**" />
<http access-denied-page="/auth/denied.html">
    <intercept-url
        pattern="/**/*.xhtml"
        access="ROLE_NONE_GETS_ACCESS" />
    <intercept-url
        pattern="/auth/**"
        access="ROLE_ANONYMOUS,ROLE_USER" />
    <intercept-url
        pattern="/auth/*"
        access="ROLE_ANONYMOUS" />
     <intercept-url
        pattern="/**"
        access="ROLE_USER" />
    <form-login
        login-processing-url="/j_spring_security_check.html"
        login-page="/auth/login.html"
        default-target-url="/registered/home.html"
        authentication-failure-url="/auth/login.html?_dc=45" />
    <logout logout-url="/auth/logout.html"
            logout-success-url="/" />
    <anonymous username="guest" granted-authority="ROLE_ANONYMOUS"/>
    <remember-me user-service-ref="userManager" key="valid key here"/>
</http>
<!-- Configure the authentication provider -->
<authentication-manager>
    <authentication-provider user-service-ref="userManager">
            <password-encoder ref="passwordEncoder" />
    </authentication-provider>
</authentication-manager>

UserDetails Implementation (Users.java):

public class Users implements Serializable, UserDetails {
    public Collection<GrantedAuthority> getAuthorities() {
     List<GrantedAuthority> auth = new ArrayList<GrantedAuthority>();
    auth.add(new GrantedAuthorityImpl("ROLE_USER"));
    return auth;
}

}

user-service-ref="userManager" (UserManagerImpl.java):

 public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException {
    Users user = null;
    try {
        user = userDAO.findByUsername(username);
    } catch (DataAccessException ex) {
        throw new UsernameNotFoundException("Invalid login", ex);
    }
    if (user == null) {
        throw new UsernameNotFoundException("User not found.");
    }
    return user;
}

Are you not getting compilation error on this line: auth.add("ROLE_USER");?

I think it should be : auth.add(new SimpleGrantedAuthority("ROLE_USER"));