If you have not created mytrackman login please setup account @ mytrackman.com
If you have an account follow steps below to find username.
1. Go to mytrackman.com
2. Log in
3. Click on your name in the top right corner
4. Click "My profile"
5. Above the big profile picture, you'll see your username.
If you do not know it, go to mytrackman.com and click on 'log-in', then 'forgot username/password'. Check your email inbox for an email to reset your password. If you don's find it, check your spam folder.