GitHubAuth - update stale accessUserId

[mattkrick]

While debugging #6015 I found that some tasks have an accessUserId that is stale, so the tasks can't be fetched. By stale, I mean the following:

• accessUserId & teamId was used to get a githubAuth
• githubAuth.accessToken was used to fetch an issue
• GitHub replied saying "Bad Credentials"

AC

• [ ] When a GitHub task.integration returns "Bad Credentials", find another team member that has good credentials & update the task.integration.accessUserId accordingly. If there are no good credentials left to be found, set task.integration to null

Estimate: 6 hours

[github-actions[bot]]

Stale issue