I would like to change my account handle
7110
How can I change my name on a Stack Exchange site?
37381
Change the Author Slug from Username to Nickname
71644
How can I remove existing duplicate accounts and records at once?
127724
Change Email and password + New Account
47376
How to Change Login Pic for Other
31381
How do I find out the user name and password for an existing account?
29402
How can I retrieve my lost account?
5404
How can I log into two different accounts on two different sites now (July 2015)?
115621
Can I request a moderator to re-activate my SO account that has been suspended because of mistake?
72191
Switch Stack Overflow account from Google login to Stack Exchange login
8327
How can I recover my account?
154395
How do I migrate users passwords?
114965
Is it possible to rename a Unix user account?
98251
How to reverse name and first name?
5629
How do I logout from a non-registered account?
18092
How do I change the email address associated with my Stack Exchange OpenID?
147088
If I change my avatar (or profile/user image) can I return to the old one?