If you fail five login attempts you'll need to fill in a captcha when you log in for 24 hours. It should reset after that.
We know it's a hassle to fill out a captcha, but we don't want anyone to be able to automate requesting login info. I know you're working on a
site scraper so you are sending automated requests to Fuelly pretty regularly. For people using the site normally I don't think this is a problem.