Vercel: failures logging in with Vercel CLI

More Vercel updates

• Sep 28Vercel: build failures and deployments serving 500s
• Sep 18Vercel: deployment stuck in initializing state
• Sep 18Vercel: Elevated Errors Triggering Deployments
• Sep 10Vercel: elevated error rate on Connect and Passport
• Sep 4Vercel: elevated latency in Sandbox API