feat: add email provider when logging in with an email

[karrui]

TL;DR

Added account record creation during email-based authentication

What changed?

• Added transaction to create both user and account records during email sign-in
• Implemented email provider account creation using normalized email as the provider account ID
• Maintained existing user creation/update logic while adding the associated account record

How to test?

1. Sign in with email authentication
2. Verify that a new account record is created in the database with:
   • Provider set to "email"
   • ProviderAccountId set to the normalized email address
   • Correct association with the user ID

Why make this change?

To maintain consistency in authentication records across different providers and ensure proper tracking of email-based authentication methods in the accounts table. This change aligns the email authentication flow with other authentication providers' data structures.

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Name	Status	Preview	Comments	Updated (UTC)
starter-kit	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 13, 2024 8:03am

[karrui]

• feat: add email provider when logging in with an email #353 👈
• main

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[datadog-opengovsg]

Datadog Report

Branch report: 11-13-feat_add_email_provider_when_logging_in_with_an_email
Commit report: b55c0b4
Test service: starter-kit

✅ 0 Failed, 11 Passed, 0 Skipped, 10.82s Total Time
⬆️ Test Sessions change in coverage: 1 increased (+0.59%)