14703: Fix condition that relied on an empty providers list.
14703: Fix condition that relied on an empty providers list.

We now always have at least :local as a onmiauth provider. This caused
an incorrect redirection from the session controller.

curoverse/sso-devise-omniauth-provider,curoverse/sso-devise-omniauth-provider,curoverse/sso-devise-omniauth-provider,curoverse/sso-devise-omniauth-provider