chore: refactoring some code to introduce a common base class for all api classes

src/Extensions/ApiOptions.cs

@@ -0,0 +1,8 @@
+namespace Novaloop.PaymoApi.Extensions
+{
+    public class ApiOptions
+    {
+        public string BaseUrl { get; set; } = "https://app.paymoapp.com/";
+        public string ApiToken { get; set; }
+    }
+}