Set after login hide login btn and show user image

I'm looking to hire a freelancer for a project involving the development of a user authentication system. The primary task is to allow the user to hide the login button after logging in and replacing it with the user's profile image. The code should be written in Javascript and the user's login details should be stored in the backend. Additionally, I'd also like to use an existing page here is code https://github.com/Ankitgupta016/cw-project
. Ideally, I'm looking for a freelancer who is experienced in this area and can start as soon as possible. The deliverables should include high quality code, thorough documentation, and complete testing.