fix(ras-acc): performance enhancements and small fixes

[chickenn00dle]

All Submissions:

• [ ] Have you followed the Newspack Contributing guideline?
• [ ] Does your code follow the WordPress' coding standards and VIP Go coding standards?
• [ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR makes some small fixes and performance updates

This PR was opened while digging into potential issues with RAS-ACC loading times. We found that the issue wasn't specific to RAS-ACC but wanted to push these changes up anyway.

How to test the changes in this Pull Request:

• Smoke test the auth flows.

Other information:

• [ ] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests for your changes, as applicable?
• [ ] Have you successfully ran tests with your changes locally?