Error when trying to get ClientID of sender of command

In this code I'm trying to get the ClientID of the sender of the command

PHP:

public function onCommand(CommandSender $sender, Command $command, $label, array $args){

switch($command->getName()){

case "test":
$clientID = $sender->getClientID();
$sender->sendMessage("Your Client ID is: " . $clientID);
}

But this error shows in console when running the command

Code:

[20:18:49] [Server thread/INFO]: An unknown error occurred while attempting to perform this command
[20:18:49] [Server thread/CRITICAL]: Unhandled exception executing command 'test': Call to undefined method pocketmine\command\ConsoleCommandSender::getClientID()
[20:18:49] [Server thread/CRITICAL]: Error: "Call to undefined method pocketmine\command\ConsoleCommandSender::getClientID()" (EXCEPTION) in "/plugins/Test/TestPlugin/Main" at line 313

Please help.

 

You have to run the command as the player, looking at the error you tried running it on the console

 

How would I do that?

 

Go on the server and run the command.

 

Ohhhhh sorry. wow how could I forget. it shouldn't work on console anyway XD