The sign-in page is accessible to logged-in users

[tmhung88]

Describe the bug
Currently logged-in users were able to open the log-in page with its url, /sign-in

To Reproduce
23ab619

Expected behavior
Users should be redirected to the home page instead

[prolland006]

hi, i found the solution but we see a little bit the login page before the redirection. I didn't found any solution for this stuff. I'm going to do the pull request.

[chrismclarke]

Thanks for this. There would be a workaround using a route-guard (I think there's an admin page that already uses auth-route or similar), but that would require a few more changes higher up so honestly I think this is fine for now. Thanks for taking the time to help us out!