NadekoBot.Extensions should now be fully annotated with nullable reference types as well as many classes from NadekoBot.Common

src/NadekoBot/Common/LoginErrorHandler.cs

@@ -1,4 +1,5 @@
-using System.Net;
+#nullable disable
+using System.Net;
 using System.Runtime.CompilerServices;
 
 namespace NadekoBot.Common;
@@ -52,4 +53,4 @@ public class LoginErrorHandler
 
         Log.Fatal(ex, "Fatal error occurred while loading credentials");
     }
-}
+}