Force Auth0 to show account picker when launching web auth flow from "Connect" CTA

[twschiller]

Context

• As a partner user, I want to switch which account I'm logged into PixieBrix with
• Currently, that's not possible because when PixieBrix kicks off the login flow, the IDP just automatically re-authenticates as the same user

Discussion

• Let's time box this. If the below resource(s) don't work, we can reach out again to partner/Auth0

Resources

• https://auth0.com/docs/authenticate/login/max-age-reauthentication#limitations-of-prompt-login-parameters
• https://auth0.com/docs/authenticate/login/max-age-reauthentication