How do I change the username?

How do I change the username? I am leaving the company, and need to do so.

You can not change the username from your end but we can do it for you. Please provide us three possible choices, as per your priority, just in case that some username is already taken.  

If you also want to change the email address of the account, you can do it on the Profile page of your account. 

How to Properly Add, Change, and Test a New Email Recipient Address