Make amount, user_id and address_id optional in user order update

src/CMSMicroservice.WebApi/Common/Mappings/GeneralMapping.cs

@@ -5,6 +5,7 @@ public class GeneralMapping : IRegister
 {
     void IRegister.Register(TypeAdapterConfig config)
     {
+        config.Default.IgnoreNullValues(true);
         config.NewConfig<string, decimal>()
             .MapWith(src => decimal.Parse(src));