If a user is accidentally associated to an account, or you simply need to remove a user from an account in Vitally, there are a few ways to do so:
When on a user profile, if you hover over an account in their Accounts list, you'll be able to remove the user from that account.
When on an Account's profile page, navigate to their Users. There, you can select the users to remove from the account.
Our Segment integration supports removing users from accounts. See this article for more info.
The Vitally API supports removing users from accounts. See this article for more info.