Add Google & GitHub Auth with provider switch

[mansiruhil]

Closes: #302

Describe the changes I've made:

• Added authentication flow with a provider switch (Google / GitHub).
• Applied fallbacks to prevent attribute errors for missing user data.
• Ensured .streamlit/secrets.toml is excluded via .gitignore to protect sensitive API keys.
• Verified locally with working login and logout flow.

Working Video:

Authentication.-.Profile.1.-.Microsoft.Edge.2025-06-28.20-59-34.mp4

[github-actions]

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[Avdhesh-Varshney]

Need a fully working video from login to logout

• Both platform behaviour should work properly
• Attach a new video, after all the mentioned changes

No need to close this PR, raise the new PR. You can commit in this PR 👍
If you need any help, connect me on Discord

[Avdhesh-Varshney]

Revoke these changes

[Avdhesh-Varshney]

Revoke

[Avdhesh-Varshney]

Remove it. No Need

[Avdhesh-Varshney]

• Keep indentation to be 2-spaces
• Instead of selectbox, use radio buttons for google & github

[Avdhesh-Varshney]

No need your work in this file
So revoke all changes

[Avdhesh-Varshney]

@mansiruhil Sorry for late response. Yes We can display them as 2 seprate buttons.
User will have choice to select a mode of login. Right?

[Avdhesh-Varshney]

@mansiruhil Sorry for late response. Yes We can display them as 2 seprate buttons. User will have choice to select a mode of login. Right?

but drop down also applicable for user I think

Yes that'll be applicable. But we should provide the quick options instead of first go for dropdown and select your provider. Right?

[Avdhesh-Varshney]

@mansiruhil Sorry for late response. Yes We can display them as 2 seprate buttons. User will have choice to select a mode of login. Right?

but drop down also applicable for user I think

Yes that'll be applicable. But we should provide the quick options instead of first go for dropdown and select your provider. Right?

can I try the button for google and github auth ?

Yah, I need that. 🙌
But also verify the flow of auth.py file as there might be some changes of displaying the user profile after authentication from github

[Avdhesh-Varshney]

@mansiruhil plz update your pr so to release this feature and close the task