song-of-the-day/song_of_the_day/MessengerIntegration/SignalIntegration.cs

public class SignalIntegration
{
    public static SignalIntegration Instance;

    public SignalIntegration(string uri, int port, string phoneNumber)
    {
        var http = new HttpClient() { 
            BaseAddress = new Uri("http://" + uri + ":" + port) 
        };
        apiClient = new song_of_the_day.swaggerClient(http);
        apiClient.BaseUrl = "";
        this.phoneNumber = phoneNumber;
    }

    private song_of_the_day.swaggerClient apiClient;

    private string phoneNumber;

    public async Task ListGroups()
    {
        Console.WriteLine("listing groups");
        try {
            ICollection<song_of_the_day.GroupEntry> groupEntries = await apiClient.GroupsAllAsync(this.phoneNumber);
            Console.WriteLine($"{groupEntries.Count} groups");
        }
        catch (Exception ex) {
            Console.WriteLine("Exception: " + ex.Message);
        }
        
        Console.WriteLine("listing groups done");
    }
}