When you call the
get_users() functions, a list of user objects are returned. Each of those users has a number of properties. What is the difference between
user_nicename in those returned properties for each user? And which of those two properties are displayed in the URL? (I am asking because both properties are the same in my case!).
user_nicename is url sanitized version of
user_login. In general, if you don’t use any special characters in your login, then your nicename will always be the same as login. But if you enter email address in the login field during registration, then you will see the difference.
For instance, if your login is email@example.com then you will have userexample-com nicename and it will be used in author’s urls (like author’s archive, post permalink, etc).