Hi Collete, It looks like you can make these fields editable or not, but you can’t mark them as required. 

There’s a feature request here which you can comment on and/or vote for if this is an important enhancement.

(Btw, if you’d like us to update your username to something simpler, just email community@gainsight.com and we can make the change for you. A handful of users ended up with usernames appended with an alphanumeric string for some reason!)

Thank you Lila.  I’ll add my 2 cents to that thread.

And thank you for letting me know about the ability to change your username.  I’ve just sent off a request!.