Extract MusicLibraryWeb.Auth module

lib/music_library_web/auth.ex

@@ -0,0 +1,10 @@
+defmodule MusicLibraryWeb.Auth do
+  def correct_login_password?(password) do
+    Plug.Crypto.secure_compare(correct_password(), password)
+  end
+
+  defp correct_password do
+    Application.get_env(:music_library, MusicLibraryWeb)
+    |> Keyword.fetch!(:auth_password)
+  end
+end