SK-2505: Add support for custom tokenUri

[saileshwar-skyflow]

Why

• The current SDK restricts custom token endpoints, which blocks Bring Your Own Cloud (BYOC) integrations.

Outcome

• Added a Custom Token URI option to enable BYOC support while maintaining full backward compatibility.

[github-actions]

✅ Gitleaks Findings: No secrets detected. Safe to proceed!

[github-actions]

Semgrep Findings: Issues with Error level severity are found (Error is Highest severity in Semgrep), Please resolve the issues before merging.

[github-actions]

✅ Gitleaks Findings: No secrets detected. Safe to proceed!

[github-actions]

Semgrep Findings: Issues with Error level severity are found (Error is Highest severity in Semgrep), Please resolve the issues before merging.

[Copilot]

Pull request overview

This PR adds support for custom token URIs to enable Bring Your Own Cloud (BYOC) integrations while maintaining backward compatibility. The implementation allows users to optionally specify a custom token endpoint through the tokenUri field in credentials.

Changes:

• Added tokenUri field to the Credentials class with getter/setter methods
• Updated token generation logic in BearerToken and SignedDataTokens to support custom token URIs with validation
• Enhanced error messaging for invalid token URI scenarios
• Added comprehensive test coverage for various token URI scenarios (valid, null, empty, invalid, HTTP/HTTPS)

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/main/java/com/skyflow/config/Credentials.java	Added tokenUri field with getter/setter methods
src/main/java/com/skyflow/utils/Utils.java	Updated bearer token generation to conditionally use custom tokenUri
src/main/java/com/skyflow/utils/validations/Validations.java	Added validation for tokenUri format
src/main/java/com/skyflow/serviceaccount/util/BearerToken.java	Implemented tokenUri override logic in bearer token generation
src/main/java/com/skyflow/serviceaccount/util/SignedDataTokens.java	Implemented tokenUri override logic in signed data token generation
src/main/java/com/skyflow/errors/ErrorMessage.java	Updated error message for invalid token URI
src/test/java/com/skyflow/utils/UtilsTests.java	Added tests for tokenUri handling in Utils class
src/test/java/com/skyflow/serviceaccount/util/BearerTokenTests.java	Added comprehensive tests for bearer token with custom tokenUri
src/test/java/com/skyflow/serviceaccount/util/SignedDataTokensTests.java	Added comprehensive tests for signed data tokens with custom tokenUri
src/test/java/com/skyflow/SkyflowTests.java	Added tests for Skyflow client initialization with custom tokenUri

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

✅ Gitleaks Findings: No secrets detected. Safe to proceed!

[github-actions]

Semgrep Findings: Issues with Error level severity are found (Error is Highest severity in Semgrep), Please resolve the issues before merging.