Ensure that the Cody Dashboard works well when changing accounts

[vdavid]

After logging out and logging in as a different user, @chrsmith saw the following UI:

• The subscription is on the Free plan, and therefore we show the “Upgrade” banner.
• The subscription is on the Pro plan, and so the Invite co-workers button is displayed

Something is busted here. And Chris guessed that it has to do with cache invalidation and having the wrong subscription data locally. (Since after logging in as another user, it should entirely be invalidated.)

In Chris's situation, he logged in as the Sourcegraph instance’s site admin. So perhaps that’s the root cause of the bug. (If so, we can ignore this, since that’s not a scenario we care about.)