fix: prevent crashing using itemgetter

[ngovinh2k2]

What?

Prevent crashing using itemgetter

Why?

From the request

How?

Testing?

• Functional Testing
• Security
• Performance
• Error Handling
• Code Quality
• Documentation
• Database
• Deployment
• Final Review

Anything Else?

[gemini-code-assist]

Code Review

This pull request refactors the authentication service to handle user information extraction more safely by replacing itemgetter with dictionary access and providing default values for optional fields. It also includes a minor formatting cleanup in a migration file. The review feedback correctly identifies that the email field is still accessed directly, which could lead to a KeyError, and suggests implementing a more graceful error handling approach using a ValidationError.

[gemini-code-assist]

While the removal of itemgetter prevents crashes when given_name or family_name are missing, accessing user_info_dict["email"] directly will still raise a KeyError if the "email" key is absent. Since the email is essential for user identification and the primary goal of this PR is to prevent crashes, it is better to handle its absence gracefully by raising a ValidationError.

    email = user_info_dict.get("email")
    if not email:
        raise ValidationError({"error": "Email not provided by the authentication provider."})