How can I stop auto login in Web Browser?

Hi, I have an issue with UE’s Web Browser Widget (It’s from Web Browser Plugin which is a built-in one). I made a google login system using web browser. It works well but if I succeed login once, web browser auto logins to google unless I manually delete all the cookies in file explorer.

I found that there are bool variable “bHasExpires” and virtual fuction “DeleteCookies” in “IWebBrowserCookieManager.h”

I tried several ways with these but failed to solve it our since I’m not used to C++.

What I want to do is deleting login information so that I can stop users auto logging in and be able to select an account that they want to use whenever they try to login.

Is there a way to solve this problem?

Thanks for reading this.