Chat::setManageUsers

public function setManageUsers(string $manageUsers): self
{
	$manageUsers = mb_strtoupper($manageUsers);
	if (!in_array(
		$manageUsers,
		[self::MANAGE_RIGHTS_MEMBER, self::MANAGE_RIGHTS_OWNER, self::MANAGE_RIGHTS_MANAGERS],
		true
	))
	{
		$manageUsers = $this->getDefaultManageUsers();
	}
	$this->manageUsers = $manageUsers ;

	return $this;
}