/**
* Sets the users account expiry date.
*
* https://msdn.microsoft.com/en-us/library/ms675098(v=vs.85).aspx
*
* @param float $expiryTime
*
* @return User
*/
public function setAccountExpiry($expiryTime)
{
$time = is_null($expiryTime) ? '9223372036854775807' : (string) Utilities::convertUnixTimeToWindowsTime($expiryTime);
return $this->setAttribute($this->schema->accountExpires(), $time, 0);
}