This class in PHP, use the accescontrol.config. I hope can be usefull in the future ;) Since u can reload the server, u have to reboot server for each modification on this file :/

register.class.php

<?php 
/**
* a PHP class for registering account in accescontrol.config remotely
* Each modification need to restart the server for load them bucause there is no reloading at the moment
*
* @author MeuhMeuh starbound.meuhmeuh.fr
* @copyright   (c) 2013, Jeremy Villemain
*/
class Register{
	/*example of use
	$r = new Register();
	$r->addAccount("Machin", "Truc");
	$r->removeAccount("Meuhmeuh");
	$r->addBan("Truc des Familles", 2);
	$r->removeBan("Machin",0);
	$r->writeData();
	//*/

	private $path = "/path/to/starbound/server/universe/accesscontrol.config";
	private $fp;
	private $json;

	function Register(){
		$this->json = null;		
		$this->readData();
	}

	private function openFile($mode){
		$this->fp = fopen($this->path,$mode);
		if(!$this->fp){
			//Helper::debug("Error: File not found, using default JSON");
			$this->defaultFile();
			return false;
		}
		

		return true;
	}

	private function closeFile(){
		fclose($this->fp);
	}

	private function readData(){
		if($this->openFile("r")){			
			$line ="";
			while (!feof($this->fp)) {
				$line .=fgets($this->fp);			
			}
			$this->json = json_decode($line, true);
			$this->closeFile();
		}

		if($this->json == null){
			//Helper::debug("Error: File was empty, using default JSON");
			$this->defaultFile();
			return false;
		}
				
	}

	private function defaultFile(){
		$this->json["accounts"] = array();
		$this->json[$this->getNameFromId(0)] = array();
		$this->json[$this->getNameFromId(1)] = array();
		$this->json[$this->getNameFromId(2)] = array();
	}	

	private function searchString($string, $tabToSearch){
		$max = count($tabToSearch);
		for($i=0;$i<$max;$i++){
			if($tabToSearch[$i] == $string)
				return $i;
		}
		return -1;
	}

	private function getNameFromId($id){
		switch($id){
			case 0: return "bannedAccountNames";break;
			case 1: return "bannedAddresses";break;
			case 2: return "bannedPlayerNames";break;
		}
	}

	public function writeData(){
		if($this->openFile("w")){
			$string = json_encode($this->json);
			fwrite($this->fp, $string);
			return "Writing file";
		}
		return "Error: writing file";
	}

	public function addAccount($user, $pass){
		if(!empty($user) && !empty($pass)){
			$user = htmlentities($user);
			$pass = htmlentities($pass);
			$this->json["accounts"][$user]["password"] = $pass;			
			return "Account added or modified";
		}
		return "Error: add account";
	}

	public function removeAccount($string){
		if(!empty($string)){
			$string = htmlentities($string);
			if(isset($this->json["accounts"][$string])){
				unset($this->json["accounts"][$string]);
				return "Accoun removed";
			}else{
				return "Account not found";
			}
					
		}
		return "Error: remove account";
	}

	public function addBan($string, $type=0){
		if(!empty($string)){
			$string = htmlentities($string);
			if($this->searchString($string,$this->json[$this->getNameFromId($type)]) == -1){
				$this->json[$this->getNameFromId($type)][] = $string;
				return "Player Banned";
			}else{
				return "Error: Already Ban";
			}
		}
		return "Error: ban";
	}

	public function removeBan($string, $type=0){
		if(!empty($string)){
			$string = htmlentities($string);
			unset($this->json[$this->getNameFromId($type)][$this->searchString($string, $this->json[$this->getNameFromId($type)])]);
			return "Player unban";		
		}
		return "Error: unban";
	}
}

?>

What does addBan("Truc des Familles", 2) and removeBan("Machin",0); second parameter means and what options there are?

is it means i should change the path to the one on my server?
$path = "/path/to/starbound/server/universe/accesscontrol.config";