Workgroup::getNumberOfMembers

static function getNumberOfMembers(int $groupId): int
{
	$query = new Query(UserToGroupTable::getEntity());

	$records = $query
		->setSelect([
			'USER_ID',
		])
		->where('GROUP_ID', $groupId)
		->countTotal(true)
		->exec()
	;

	return $records->getCount();
}