LambdaHackWeek: Implement Social Login(OAuth Authentication)

[Julian-dev28]

Please add PRs to the update-P21 branch

Description:
Add OAuth authentication to the Soroban Example Dapp to allow users to log in using their social media accounts.

Tasks:

1. Set Up OAuth Providers:
   • Configure OAuth providers (e.g., Google, Facebook).
   • Obtain necessary API keys and credentials.
2. Implement Frontend Login Flow:
   • Create a login button for each OAuth provider.
   • Redirect users to the provider's authentication page.
   • Handle the OAuth callback and retrieve user information.
3. Integrate OAuth Authentication on Backend:
   • Implement backend endpoints to handle OAuth authentication.
   • Validate and store OAuth tokens securely.
   • Create or update user records based on OAuth data.
4. Ensure Secure Handling of OAuth Tokens:
   • Implement best practices for storing and managing OAuth tokens.
   • Ensure secure transmission of tokens between frontend and backend.

Expected Outcome:

• Users can log in using their social media accounts.
• Secure and seamless OAuth authentication flow.
• Properly stored and managed OAuth tokens.

Why This Is Important:
OAuth authentication provides a convenient and secure login method for users, enhancing user experience and potentially increasing user engagement.