Refresh APS Token

[PepperLola]

Changes:

• Refresh the APS auth data when requested after it's expired
• Move code challenge generation and verifier to server

[!IMPORTANT]

• [x] ~~Waiting on server update PR to merge~~

JIRA Issue

[HunterBarclay]

I'm getting a number of errors. It's trying to use APS.auth but that is private.

[HunterBarclay]

@PepperLola I'm having issues with the code challenge endpoint. For some reason it's giving a 500 error

[autodesk-chorus[bot]]

Chorus detected one or more security issues with this pull request. See the Checks tab for more details.

As a reminder, please follow the secure code review process as part of the Secure Coding Non-Negotiable requirement.