In my ecommerce module I create a user automatically after the customer enters an email address (if he is not registered in this portal with that email address. in that case I ask for the password). That works like a charm, no problem.
But when the same user already exists in another portal in the same dnn installation, createuser returns "UserCreateStatus.UsernameAlreadyExists". How can I add this existing user from the other portal to the actual portal ? I can not see any UserController.AddUserToPortal(UserId, PortalId) - method. Would be easy for me to create the SQL statement by myself but that is not my preferred way....