Test delete user

1. Go back to your frontend application (at http://localhost:5173/).
2. In the list of users, on the row of the user with William Henry Gates III name, click the Action button (the three dots at the end of the row).
3. Click Delete.

4. Enter the email of that user bill@microsoft.com in the input.
5. Click Delete.

6. You should see the deleted user is no longer existed in the users list.