refactor auth

lib/policy_service/application.ex

@@ -3,12 +3,12 @@ defmodule PolicyService.Application do
   # for more information on OTP Applications
   @moduledoc false
 
+  @zitadel Application.fetch_env!(:policy_service, :zitadel)
+
   use Application
 
   @impl true
   def start(_type, _args) do
-    zitadel_config = Application.get_env(:policy_service, :zitadel, [])
-
     children = [
       PolicyService.CommandedApp,
       PolicyService.Handlers.QuoteRequestHandler,
@@ -22,7 +22,7 @@ defmodule PolicyService.Application do
       {Phoenix.PubSub, name: PolicyService.PubSub, pool_size: 1},
       {Oidcc.ProviderConfiguration.Worker,
        %{
-         issuer: Keyword.get(zitadel_config, :issuer),
+         issuer: @zitadel[:issuer],
          name: PolicyService.ZitadelProvider
        }},
       PolicyServiceWeb.Endpoint