I'm not sure you may be asking this in the right forum (if not, I can get this question moved into the right place). Are you working with a DevNet Sandbox or have an active Sandbox reservation?
I try to get my tokens as desribed, but I got back error
Cannot bind to address "http://0.0.0.0:80/devlab/apicem/devnettokenapis/login" No component registered on that endpoint
( I used the cURL example with my own username and pass etc)