The “Allow Users to Log in With Email” feature generates cryptic username

Hi,

Thank you for reaching out to us.

With some custom code we can remove the domain from the user name:

1. Create an empty plugin like this: https://gist.github.com/sareiodata/76f701e01db6685829db
2. Add the following code to the end of it:

/*
 * Filter to change the random username when "Allow Users to Log in With" is set to Email
 * The username will display the email address without the domain
 */

add_filter('wppb_generated_random_username', 'wppbc_rand_username', 10, 2);
function wppbc_rand_username( $username, $user_email ){
    $username = explode('@', $user_email);
    $username = $username[0];
    $j = 1;
    while ( username_exists( $username ) ){
        $username = $username . '_' . $j;
        $j++;
    }

    return $username;
}

3. Install this plugin via FTP (copy it inside wp-content/plugins) or create a zip archive with it and install it via the WordPress plugin upload functionality

The custom code will not modify existing users. It will only work for new registrations.

After installing and activating the plugin please register a test user and let me know if it works for you.

Best regards,