feat: openid connect support (#2873)

config/routes.rb

@@ -85,6 +85,10 @@ Rails.application.routes.draw do
   match "login/reset" => "sessions#begin_password_reset", :via => [:get, :post]
   match "login/reset/:token" => "sessions#finish_password_reset", :via => [:get, :post]
 
+  if Postal::Config.oidc.enabled?
+    get "auth/oidc/callback", to: "sessions#create_from_oidc"
+  end
+
   get "ip" => "sessions#ip"
 
   root "organizations#index"