We sell elearning courses and I need to be able to send each registrant a unique "Keycode" so they can login to the elearning course. Can I do this with formscentral registration forms?
Not at this time.
If there are no specific requirements for how the keycode value is generated, your request is similar to this feature idea:
with the additional requirement to allow that the unique ID be sent to the form respondent in the submission receipt. Feel free to either vote for that idea or submit a new one if it doesn't fit your requirements. We use the Ideas section to help prioritize our work.