public function getUserIdByDmId($dmId)
{
$dms = Ar::get($this->getSlackApi()->imList(), 'ims');
return Ar::reduce($dms, function ($current, $value) use($dmId) {
if (null !== $value) {
return $value;
}
return Ar::get($current, 'id') == $dmId ? Ar::get($current, 'user') : null;
});
}
