Hello ... Techforce directed me here to get help for this issue. My name and email address are incorrect in trailhead. How can I change them?

Correct: David Bui-Ford, david.buiford@salesforce.com
Incorrect (as shown in trailhead): David Bui, david.bui@salesforce.com

Thanks!

As I am only a contract employee and I am sick of starting new each time I move to a new org to work in, I thought it time to ask the question. How do I change my trailhead email for logging in from my work (current employer) email to my 'personal work' email.