canvasManagement/Management.Web/ConfigurationSetup.cs

public static class ConfigurationSetup
{
    public static void Canvas(WebApplicationBuilder builder)
    {
        var canvas_token = builder.Configuration["CANVAS_TOKEN"] ?? throw new Exception("CANVAS_TOKEN is null");
        
        var canvas_url = builder.Configuration["CANVAS_URL"];
        if (canvas_url == null)
        {
            Console.WriteLine("CANVAS_URL is null, defaulting to https://snow.instructure.com");
            builder.Configuration["CANVAS_URL"] = "https://snow.instructure.com";
        }
    }
}