Port Go and Java changes

[ewanharris]

Description

Ports the following Go and Java changes:

• https://github.com/openfga/java-sdk/pull/77
• https://github.com/openfga/java-sdk/pull/76
• https://github.com/openfga/go-sdk/pull/91
• https://github.com/openfga/go-sdk/pull/78

References

Review Checklist

• [x] I have clicked on "allow edits by maintainers".
• [ ] I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• [x] The correct base branch is being used, if not main
• [ ] I have added tests to validate that the change in functionality is working as expected