ASP Minimal API Deserializor - allow Fields

app.MapPost("/update", ((int[] cities, double distance) newBest) =>

I want my minimal api to be able to deserialize that tuple. The System.Test cant do that by default though. Typically i fix that with those serializor options, but i dont know how to provide my settings for the minimal api

var serializerOptions = new JsonSerializerOptions { IncludeFields = true };

thanks