diff --git a/README.md b/README.md
index 61fb74e..2ffb582 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,8 @@ Plugin for PocketMine-MP that prevents people to impersonate an account, requeri
 
 * `/login <password>`
 * `/register <password>`
-* `/unregister <password>` (TODO)
-* For OPs: `/simpleauth <command: help|unregister> [parameters...]` (TODO)
+* `/unregister <password>`
+* For OPs: `/simpleauth <command: help|unregister> [parameters ...]`
 
 
 ## Configuration
@@ -50,6 +50,7 @@ You can modify the _SimpleAuth/config.yml_ file on the _plugins_ directory once
 | simpleauth.lastip | true | Allows authenticating using the lastIP when enabled in the config |
 | simpleauth.command.register | true | Allows registering an account |
 | simpleauth.command.login | true | Allows logging into an account |
+| simpleauth.command.simpleauth | op | Manage accounts |
 
 ## For developers
 
diff --git a/plugin.yml b/plugin.yml
index 76a6900..1b2d22c 100644
--- a/plugin.yml
+++ b/plugin.yml
@@ -16,6 +16,14 @@ commands:
   description: "Registers an account"
   usage: "/register <password>"
   permission: simpleauth.command.register
+ unregister:
+  description: "Unregister an account"
+  usage: "/unregister <password>"
+  permission: simpleauth.command.register
+ simpleauth:
+  description: "Manage accounts"
+  usage: "/simpleauth help|unregister [parameters ...]"
+  permission: simpleauth.command.simpleauth
 
 permissions:
  simpleauth:
@@ -41,3 +49,6 @@ permissions:
      simpleauth.command.login:
       description: "Allows logging into an account"
       default: true
+     simpleauth.command.simpleauth:
+      description: "manage simpleauth accounts"
+      default: op
diff --git a/resources/messages.yml b/resources/messages.yml
index 221cc07..008ded4 100644
--- a/resources/messages.yml
+++ b/resources/messages.yml
@@ -24,4 +24,14 @@ login:
  error:
   password: "Incorrect password!"
   registered: "This account is not registered."
-  block: "Too many tries!"
\ No newline at end of file
+  block: "Too many tries!"
+  ingame: "This command only works in-game."
+
+simpleauth:
+ unregistered: "%s unregistered"
+ notregistered: "You are no longer registered!"
+ help: "Use unregister to unregister players"
+ error:
+  unregister: "Unable to unregister %s"
+  usage1: "/simpleauth unregister player"
+  notfound: "Player %s not found"
diff --git a/src/SimpleAuth/SimpleAuth.php b/src/SimpleAuth/SimpleAuth.php
index 5824cd7..eb98f73 100644
--- a/src/SimpleAuth/SimpleAuth.php
+++ b/src/SimpleAuth/SimpleAuth.php
@@ -217,6 +217,21 @@ public function getDataProvider(){
 		return $this->provider;
 	}
 
+	/**
+	 * @api
+	 *
+	 * @param IPlayer $player
+	 * @param string $password
+	 *
+	 * @return bool
+	 */
+	public function checkPassword(IPlayer $player, $password){
+		if(($data = $this->provider->getPlayer($player)) === null){
+			return false;
+		}
+		return hash_equals($data["hash"], $this->hash(strtolower($player->getName()), $password));
+	}
+
 	/* -------------------------- Non-API part -------------------------- */
 
 	public function closePlayer(Player $player){
@@ -252,7 +267,7 @@ public function onCommand(CommandSender $sender, Command $command, $label, array
 
 					$password = implode(" ", $args);
 
-					if(hash_equals($data["hash"], $this->hash(strtolower($sender->getName()), $password)) and $this->authenticatePlayer($sender)){
+					if($this->checkPassword($sender, $password) and $this->authenticatePlayer($sender)){
 						return true;
 					}else{
 						$this->tryAuthenticatePlayer($sender);
@@ -261,7 +276,7 @@ public function onCommand(CommandSender $sender, Command $command, $label, array
 						return true;
 					}
 				}else{
-					$sender->sendMessage(TextFormat::RED . "This command only works in-game.");
+					$sender->sendMessage(TextFormat::RED . $this->getMessage("login.error.ingame"));
 
 					return true;
 				}
@@ -287,13 +302,78 @@ public function onCommand(CommandSender $sender, Command $command, $label, array
 						return true;
 					}
 				}else{
-					$sender->sendMessage(TextFormat::RED . "This command only works in-game.");
+					$sender->sendMessage(TextFormat::RED . $this->getMessage("login.error.ingame"));
 
 					return true;
 				}
 				break;
-		}
+			case "unregister":
+				if($sender instanceof Player){
+					if(!$this->isPlayerRegistered($sender) or ($data = $this->provider->getPlayer($sender)) === null){
+						$sender->sendMessage(TextFormat::RED . $this->getMessage("login.error.registered"));
+
+						return true;
+					}
+					if(count($args) !== 1){
+						$sender->sendMessage(TextFormat::RED . "Usage: " . $command->getUsage());
 
+						return true;
+					}
+					$password = implode(" ", $args);
+
+					if($this->checkPassword($sender, $password)){
+						if ($this->deauthenticatePlayer($sender) and $this->unregisterPlayer($sender)){
+							$sender->sendMessage(TextFormat::RED . $this->getMessage("join.register"));
+						}else{
+							$sender->sendMessage(TextFormat::RED . $this->getMessage("register.error.general"));
+						}
+						return true;
+					}else{
+						$sender->sendMessage(TextFormat::RED . $this->getMessage("login.error.password"));
+
+						return true;
+					}
+				}else{
+					$sender->sendMessage(TextFormat::RED . $this->getMessage("login.error.ingame"));
+
+					return true;
+				}
+				break;
+			case "simpleauth":
+				if(count($args) < 1){
+					return false;
+				}
+				$subcmd = strtolower(array_shift($args));
+				switch($subcmd){
+					case "unregister":
+						if(count($args) < 1){
+							$sender->sendMessage(TextFormat::RED . $this->getMessage("simpleauth.error.usage1"));
+							return true;
+						}
+						foreach($args as $name){
+							$player = $this->getServer()->getOfflinePlayer($name);
+							if(!$this->isPlayerRegistered($player)){
+								$sender->sendMessage(TextFormat::RED.  sprintf($this->getMessage("simpleauth.error.notfound"), $name));
+								continue;
+							}
+							if($this->unregisterPlayer($player)){
+								$sender->sendMessage(TextFormat::GREEN . sprintf($this->getMessage("simpleauth.unregistered"), $name));
+								if($player instanceof Player){
+									$player->sendMessage(TextFormat::YELLOW.$this->getMessage("simpleauth.notregistered"));
+									$this->deauthenticatePlayer($player);
+								}
+							}else{
+								$sender->sendMessage(TextFormat::RED . sprintf($this->getMessage("simpleauth.error.unregister"), $name));
+							}
+						}
+						return true;
+						break;
+					case "help":
+						$sender->sendMessage(TextFormat::GREEN . $this->getMessage("simpleauth.help"));
+						return true;
+				}
+				break;
+		}
 		return false;
 	}