Use subscription and fallback to credits, or allow switching without re-login

I use Claude Code with a Pro subscription and also have API credits in my console account.

It would be helpful to have unified authentication that allows access to both plans simultaneously. This way, I could seamlessly fall back to API credits when my Pro plan usage limit is reached, rather than having to log out and log back in to switch between the two options.

Alternatively, being able to switch accounts would also work.