EntraID support for DataSync

[ssubramanya]

Description

##Update: I've updated the link in the readme.md - but will confirm the commit ID used since it shows this banner

Note:

The files under "Sql.Management.Sdk" are generated except readme.md - So Please use that as just reference to review for the API calls if needed. Thanks!

Summary of Changes

Draft PR Notice

This is a draft PR.

• The required API spec PR is not yet committed.
• Raising this early for review to ensure all changes are aligned.
• Once the API spec is merged, the only remaining step will be to commit and finalize this implementation.

---

Added UAMI Support

• Added UAMI support for Data Sync cmdlets.
• Introduced three new parameters across New-* and Update-* cmdlets:
  • HubDatabaseAuthenticationType
  • MemberDatabaseAuthenticationType
  • IdentityId

These parameters allow customers to:

• Select authentication type (Password or UserAssigned)
• Optionally provide a user-assigned identity.

---

Backward Compatibility

• The latest API version now makes the Identity field mandatory on sync group/member resources.
• To avoid breaking existing customers using username/password authentication:
  • Cmdlets automatically pass Identity = { Type = "None" } in the background.
  • This ensures:
    • No visible changes in behavior
    • Password-based authentication continues to work without requiring new parameters.

---

Validation Logic

• Password authentication
  • Requires Username and Password.
• UserAssigned authentication
  • Requires IdentityId when creating new resources.
• Update behavior
  • If UserAssigned is specified without IdentityId, cmdlet preserves the existing identity instead of throwing.
  • This supports partial updates intentionally.

---

Help and Documentation

• Updated cmdlet help files with:
  • New parameters and their accepted values (Password, UserAssigned)
  • Examples for both password and UAMI flows.

---

Resource Strings

• Added localized error messages for:
  • Missing credentials
  • Missing IdentityId
  • Invalid authentication type

---

Testing

• No scenario tests yet
  • Data Sync scenario tests record once and capture API responses.
  • Since the new API version is not yet available in stage, reliable baselines cannot be recorded.
• Planned tests (once stage is ready):
  • Creating sync groups and members with UAMI authentication
  • Updating existing groups/members to use UAMI
  • Backward compatibility with password authentication
• For now:
  • Changes validated by code inspection only
  • Tests will be added as a follow-up.

Mandatory Checklist

• Please choose the target release of Azure PowerShell. (⚠️Target release is a different concept from API readiness. Please click below links for details.)

  • General release
  • Public preview
  • Private preview
  • Engineering build
  • No need for a release

• Check this box to confirm: I have read the Submitting Changes section of CONTRIBUTING.md and reviewed the following information:

• SHOULD update ChangeLog.md file(s) appropriately
  • Update src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md.
    • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header in the past tense.
  • Should not change ChangeLog.md if no new release is required, such as fixing test case only.
• SHOULD regenerate markdown help files if there is cmdlet API change. Instruction
• SHOULD have proper test coverage for changes in pull request.
• SHOULD NOT adjust version of module manually in pull request

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