Passing "badge" parameters causes 500 error.

Passing in the badge parameter as a String in the JSON payload to the server causes a 500 error to be returned.

Sample JSON payload:
{
criteria:

{ alias: [param.alias.toString()], }

,
message:

{ alert: params.text, badge: params.badge.toString() || '0', }

}

If badge is not a String the operation is fine, but the docs state it's a String: https://github.com/aerogear/aerogear-unifiedpush-nodejs-client/blob/master/README.md