We'll create fresh WordPress site with Credible Names installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Validate Profile Credentials and Names
In a WordPress site users have multiple names in their profile, the user login, display name and nick name. In a multi-user site, there is often a need to keep them unique. You need to allow users have only credible names, such that,
Credible Names is a easy plugin to help you with that.