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,
- All display names are unique
- All nicknames are unique
- No nickname is a display name or login name of another user
- No display name is a nickname or login name of another user
Credible Names is a easy plugin to help you with that.