How do I remove login credentials (emails or OpenIDs) from my account?
For more information, see "How do I add or move login credentials from my account?" in the Help Center.
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You must go to any Q&A site, such as Stack Overflow, then to your profile → Edit profile and settings → My logins. You can also visit the page directly by going to
You will now see the remove button, like the below:
Note: changing your login methods on one site will change your login methods for all sites you currently use. (source)