Using wordpress user accounts with an iOS app

Figured out how to do it. You can do it with xml-rpc. Here's the code I have in my request plugin if anyone ever needs it:

function register_user($args){    require_once( ABSPATH . WPINC . '/registration.php' );/* Check if users can register. */$registration = get_option( 'users_can_register' );    /* If user registered, input info. */        $userdata = array(            'user_pass' => esc_attr( $args[2] ),            'user_login' => esc_attr( $args[0] ),            'first_name' => esc_attr( "" ),            'last_name' => esc_attr( "" ),            'nickname' => esc_attr( "" ),            'user_email' => esc_attr( $args[1] ),            'user_url' => esc_attr( "" ),            'aim' => esc_attr( "" ),            'yim' => esc_attr( ""),            'jabber' => esc_attr( "" ),            'description' => esc_attr( "" ),            'role' => get_option( 'default_role' ),        );        if ( !$userdata['user_login'] ){            $error = __('A username is required for registration.', 'frontendprofile');            return "user-invalid";              }elseif ( username_exists($userdata['user_login']) ){            $error = __('Sorry, that username already exists!', 'frontendprofile');            return "user-used";        }elseif ( !is_email($userdata['user_email'], true) ){            $error = __('You must enter a valid email address.', 'frontendprofile');            return "email-invalid";         }elseif ( email_exists($userdata['user_email']) ){            $error = __('Sorry, that email address is already used!', 'frontendprofile');            return "email-used";        }        else{            $new_user = wp_insert_user( $userdata );            wp_new_user_notification($new_user, $user_pass); //send the user an email with the information            return "success";        }     update_user_meta( $args[0]->ID, 'setup', "0" );}