What is wrong with this post? : Is there any typo error? I cannot find any!

It is a simple crud application with slim framework I am using mysql database... slim version is 2.6.2

Image of postman:

[![enter image description here][1]][1]

    // Adds a customer
    function addCustomer() {
    	//$request = Slim::getInstance()->request();
    	$request = \Slim\Slim::getInstance()->request();
    	$cus = json_decode($request->getBody());
    
    	$sql = "INSERT INTO customers (Username,First_Name,Last_Name,Email,Phone,Password,Type,Status) VALUES (:username, :firstname, :lastname, :email, :phone, :password, :type, :status)";
    	try {
    		$db = DB_Connection();
    		$stmt = $db->prepare($sql);  
    		
    		$stmt->bindParam("username", $cus->Username);
    		$stmt->bindParam("firstname", $cus->First_Name);
    		$stmt->bindParam("lastname", $cus->Last_Name);
    		$stmt->bindParam("email", $cus->Email);
    		$stmt->bindParam("phone", $cus->Phone);
    		$stmt->bindParam("password", $cus->Password);
    		$stmt->bindParam("type", $cus->Type);
    		$stmt->bindParam("status", $cus->Status);
    		$stmt->execute();
    		$cus->id = $db->lastInsertId();
    		$db = null;
    		echo json_encode($cus); 
    	} catch(PDOException $e) {
    		echo '{"error":{"text":'. $e->getMessage() .'}}'; 
    	}
    }


[![enter image description here][2]][2]


  [1]: http://i.stack.imgur.com/9zOAA.png
  [2]: http://i.stack.imgur.com/fckFM.png