title: Way to use locust.io by supplying user list
body: <p>I need to stress-test a system and <a href="http://locust.io" rel="noreferrer">http://locust.io</a> seems like the best way to go about this. However, it looks like it is set up to use the same user every time. I need each spawn to log in as a different user. How do I go about setting that up? Alternatively, is there another system that would be good to use?</p>