Fix Normal Sign-In flow (allow login only after signup)

[nagarjunpl]

Currently, the normal email/password login is not working correctly.

• Users are able to log in with fake/unregistered credentials.

• Email verification is not being checked.

Expected Behavior:

• On first time, users must sign up with a valid email and password.

• On subsequent logins, only registered users should be allowed to log in.

• Invalid credentials should show an error message and not allow login.

This will ensure proper authentication flow and prevent fake or unauthorized logins.

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊

[omroy07]

Assigned