let i = console.info;
i(`Stack Exchange Authentication starting...`);
i(`Hitting stackexchange.com/users/signin to get form URL`);
let loginFormUrl = yield this.getLoginFormUrl();
i(`Got it! Hitting ${loginFormUrl}...`);
let loginFormBody = yield this.getBody(loginFormUrl);
let formDocument = cheerio.load(loginFormBody);
let fkey = formDocument('input[name="fkey"]').val();
let affId = formDocument('input[name="affId"]').val();