From 1876a10b2695afa356d60c31714f3ffc4f9adfa6 Mon Sep 17 00:00:00 2001
From: Jonas Dellinger <jonas.dellinger@2trde.com>
Date: Sat, 21 May 2022 20:13:30 +0200
Subject: [PATCH] Abort example if env variables are not set

---
 SpotifyAPI.Web.Examples/Example.CLI.CustomHTML/Program.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/SpotifyAPI.Web.Examples/Example.CLI.CustomHTML/Program.cs b/SpotifyAPI.Web.Examples/Example.CLI.CustomHTML/Program.cs
index f6e7e6b8..b5daf38e 100644
--- a/SpotifyAPI.Web.Examples/Example.CLI.CustomHTML/Program.cs
+++ b/SpotifyAPI.Web.Examples/Example.CLI.CustomHTML/Program.cs
@@ -16,6 +16,13 @@ namespace Example.CLI.CustomHTML
 
     public static async Task Main()
     {
+      if (string.IsNullOrEmpty(clientId) || string.IsNullOrEmpty(clientSecret))
+      {
+        throw new NullReferenceException(
+          "Please set SPOTIFY_CLIENT_ID and SPOTIFY_CLIENT_SECRET via environment variables before starting the program"
+        );
+      }
+
       _server = new EmbedIOAuthServer(
         new Uri("http://localhost:5000/callback"),
         5000,