Use real identity provider locally

[colinansah]

Is your feature request related to a problem? Please describe.
When developing locally, I cannot test my application against a real identity provider using the static web apps CLI.

Describe the solution you'd like
I would like to have the option to use the mock authentication interface or a real provider.

context
I want to be able to turn off this interface and use auth0 locally.
auth0 mock interface image

[joeldeteves]

+1

[adrianhall]

Dup of #306