Update README.md

[zwgsyko]

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[gemini-code-assist]

Summary of Changes

Hello @zwgsyko, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on refining the project's README.md by eliminating references to specific authentication methods that are no longer applicable or supported. The objective is to ensure the documentation remains accurate and relevant, providing a clearer guide for users by removing potentially confusing or deprecated options.

Highlights

• Documentation Cleanup: Removed outdated or irrelevant Facebook authentication methods (Firebase popup and redirect) from the README.md file.
• Authentication Method Pruning: Removed the entry for Multi-factor authentication with SMS (specific to Google Cloud Identity Platform) from the README.md.

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[gemini-code-assist]

Code Review

This pull request updates the main README.md file by removing references to a few authentication samples. While the changes to the README.md file itself are minor, they introduce inconsistencies with other parts of the project. Specifically, the samples for Facebook popup/redirect authentication and Multi-Factor Authentication are removed from the main list, but the corresponding sample files and their mentions in auth/README.md are still present. This could lead to confusion for users trying to navigate the samples. My review includes suggestions to address these inconsistencies.

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README.md (16-17)

These two list items for Facebook authentication via popup and redirect are being removed. However, the sample files (auth/facebook-popup.html, auth/facebook-redirect.html) and the references in auth/README.md (line 10) still exist. This could be confusing for users. If these samples are being deprecated, consider removing the corresponding files and updating auth/README.md as well. If not, these items should likely be kept in the list.

README.md (27)

This list item for Multi-factor authentication is being removed. However, the sample for MFA (auth/mfa-password.html) and its documentation in auth/README.md (line 14) still exist. This creates an inconsistency. If the sample is still supported, it should be listed here. Note that the original item was also missing a link to the sample file, unlike other items in the list. If the sample is being removed, the corresponding files should also be deleted to avoid confusion.