Sorry you had trouble remembering your username.
The username is not supplied in email for security reasons.
If it were to send out an email containing both username and password, wouldn't that leave your admin area somewhat at-risk in terms of security?
At install-time, you have the option of entering your own choice of admin username, password, and email address. It would be prudent to record this information if it is something you wouldn't easily remember.
If you are not using the installer provided by Zen Cart, but instead are using a one-click install provided by your hosting company, you should write down the admin access information which they provide you with at the end of the installation.
These steps would save you some headaches in the future.
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