cannot ignore stdio

[yibingxiong]

var Client = require('svn-spawn');
var client = new Client({
    cwd: '/path to your svn working directory',
    username: 'username', // optional if authentication not required or is already saved
    password: 'password', // optional if authentication not required or is already saved
    noAuthCache: true, // optional, if true, username does not become the logged in user on the machine
});

Like this, when the username or password is wrong. the server will open a stdio to wait input username and password. This is can't ignore the stdio.
Could you support this feature?