FB login – replace login name with email

Plugin: yith-woocommerce-social-login

Update this file: yith-woocommerce-social-login/includes/class-yith-social-login.php (Line 180)

//重要的一行
//如果displayName是中文，會造成錯誤, 所以改成用Email代替
//$hyb_user_login           = sanitize_user($user_profile->displayName, true);
$hyb_user_login           = sanitize_user($hyb_email, true);