User administrators will receive an updatePendingJoinRequests, and should invoke messages.getChatInviteImporters with the requested flag set to obtain a list of users waiting to be admitted into the group.
$contacts = get_option('contact_api_settings', false);
$phone = $contacts ? $contacts['contact_api_text_field_0'] : '';
$email = $contacts ? $contacts['contact_api_text_field_2'] : '';
$work_time = $contacts ? $contacts['contact_api_text_field_3'] : '';