WeatherClient.cs

using System.Net.Http;
using System.Net.Http.Json;
using System.Threading.Tasks;
using Microsoft.Extensions.Options;

namespace Dotnet5MicroService{
    public class WeatherClient{
        public readonly HttpClient _httpClient;
        public readonly ServiceSettings _settings;
        public WeatherClient(HttpClient httpClient, IOptions<ServiceSettings> options)
        {
         _httpClient = httpClient;
         _settings = options.Value;   
        }

        public record Weather(string description);
        public record Main(decimal temp);
        public record Forecast(Weather[] weather, Main main, long dt);

        public async Task<Forecast> GetCurrentWeatherAsync(string city)
        {
            var forecast = await _httpClient.GetFromJsonAsync<Forecast>($"https://{_settings.OpenWeatherHost}/data/2.5/weather?q={city}&appid={_settings.ApiKey}&units=metric");
            return forecast;
        }
    }
}