User Account Management

User Account Management

I have a white label reports site.  When new users come online I have them sign up for an account at our login page.  How is this account then managed?  I understand that the most I can do is share views to the account, deactivate, or change user type.  I would however like to be able to change the username.  There doesn't seem to be an option for the user to manage the account when logged it, it only provides an option to Log Out.