How to find my username

[Eh_thaw___]

I going to sign up for a program but I forget my username and password
The most important is I only need to know my username

 

[webworkings]

If you are going to sign up for it, there wouldn't be a user name. However if you signed up in the past there would be.

The site should have a link on its log in page for forgotten usernames and passwords.