$results = $c->userService()->searchUsers('j', 'organization_1');

foreach ($results as $userLookup) {
    $user = $c->userService()->getUserByLookup($userLookup);
    printf('<br>Found user: %s', $user->fullName);
    foreach ($user->roles as $role)
        printf('<br> %10s User has role: %s', '&nbsp;', $role->roleName);
}