An example operation may include one or more of authenticating a user, by a first system node, based on a first set of user credentials, computing, by the first system node, a second set of user credentials for a second system node, determining, by the first system node, if the second system node has a user with the second set of the user credentials, and responsive to the second system node not having the user with second set of the user credentials, deleting, by the first system node, an existing user of the second system node.