public function getGroup($groupId)
{
try {
$group = Group::getById($groupId);
if (is_null($group)) {
throw new \Exception("Group " . $groupId . " does not exist");
}
$this->getApp()->render(200, ['data' => $group->toArray()]);
} catch (\Exception $e) {
$this->getApp()->render(500, ['error' => $e->getMessage()]);
}
}
