How do I change parts of my terminal prompt? In Terminal it says

Last login: Mon Jan 13 00:00:14 on ttys000
Logsdon:~ DomGomez$ 


How do I change the DomGomez part in Terminal?
If you're familiar with customising your .bashrc, I would suggest customising your prompt(PS1). Here is a tutorial among (a lot of) others about it.