- Go to client page> click on 'More' button.
- In 'More' menu, click on 'Create Self Service user'
- In next navigation page - create self service user page - provide username which is already used and uncheck 'Auto Generate password'.
- Provide password and then click on 'Activate Self Service User' button.
Should throw validation, "Username is already taken".
No validation message is displaying and if we check the network, it is showing 500 internal server error.