@Override
    public User createUser(String username, String password, String name, String email) throws UserAlreadyExistsException
    {
        return getUserProvider(username).createUser(username, password, name, email);
    }
Returns whether <em>all</em> backing providers require an email address to be set on User objects. If at least
one provider does not, this method returns false.

@return true when all backing providers require an email address to be set on User objects, otherwise false.
xmppserver/src/main/java/org/jivesoftware/openfire/user/UserMultiProvider.java