Jun 18, 2019 03:35 PM|bruce (sqlwork.com)|LINK
the Security stamp is not for multiple logins, but used to detect if the login was modified and invalid the cookie cache. With security stamp validation, if you remove a users permission, or disable an account it will be detected on the next request. Without
the stamp, it will be detected on cookie expiration.
You will need a different timestamp (initial login of this cookie) to do what you want.