Implement conditional create in Shrine

[cy245]

Implements Conditional Create (also called Automatic Passkey Upgrade) in Shrine

Also fixes login function to use more correct server endpoint (original returns an empty object which was causing a bug).

[gemini-code-assist]

Summary of Changes

Hello @cy245, 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 introduces the capability for conditional passkey creation within the Shrine application. It refactors the existing authentication mechanism to support a unified username and password login, which then seamlessly allows for the creation of a passkey if the user has logged in with traditional credentials. This change improves the security and convenience of user authentication by promoting passkey adoption after a successful password-based sign-in.

Highlights

• Conditional Passkey Creation: The createPasskey function in CredentialManagerUtils.kt now accepts an isConditional parameter, enabling conditional passkey creation based on the authentication context.
• Authentication API Refactoring: The AuthApiService.kt has been updated to replace separate setUsername and setPassword endpoints with a single loginWithUsernamePassword endpoint for a more unified authentication process.
• Login Request Model Update: The LoginRequest.kt file now defines a LoginUsernamePasswordRequest data class, which includes both username and password, replacing the older EditUsernameRequest and PasswordRequest models for login operations.
• Repository Authentication Logic Streamlining: The AuthRepository.kt has been modified to utilize the new loginWithUsernamePassword API, streamlining the login process and removing the deprecated setSessionWithPassword function.
• UI/ViewModel Integration for Passkey Adoption: The AuthenticationScreen.kt and AuthenticationViewModel.kt now incorporate logic to trigger conditional passkey creation immediately following a successful password-based login, enhancing user experience by promoting passkey adoption.

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[gemini-code-assist]

Code Review

This pull request successfully implements conditional passkey creation after a password-based login, which is a great step towards encouraging passkey adoption. The refactoring of the login flow into a single API call is also a significant improvement for both code clarity and efficiency. I've identified a couple of potential issues related to error handling and a possible race condition in the UI flow that could lead to a confusing user experience. Addressing these points will make the implementation more robust.

[niharika2810]

Minor comments, Kindly check