Problem: The UI doesn't provide an error message when the admin tries to create a user but it is unsuccessful.
When the admin tries to create a user and there is an error, the admin should see a UI error message that says the user was not created, or the user creation was unsuccessful. Currently they receive no UI error message but the server fails to create a new user.
Steps to reproduce:
1. PUT /api/users with body
helpful message need to be added for key.