Make WordPress User Name the Email Address When Register

Question

Is it possible to make WordPress user name the Email Address? when user register in my site.

So unername could be hidden or not required and is replaced with email address.

I use WP User Frontend plugin.

I know there are plugins that can allow users to use their email as the log in, but they still have to enter the username when they register. I want to try and do away with the username.

Answer 1

You could use the user_register-hook, to replace the username with the mail-address right after the account has been created.

It could be something like this (untested) in your functions.php:

add_action( 'user_register', 'wpse216787_mail_as_username', 10, 1 );

function wpse216787_mail_as_username( $user_id ) {
    $email = get_the_author_meta( 'user_email', $user_id );
    update_user_meta($user_id, 'user_login', $email );
}