public interface ITwilioClient: ITwilioRestClient

    {

        public Task SendSMSAsync(IList<string> phoneNumbers, string message);

​

        Task<RoomResource> CreateRoomAsync();

    }

 public class TwilioClient : ITwilioClient

    {

        private readonly ITwilioRestClient _innerClient;

        private readonly IConfiguration _configuration;

​

        public TwilioClient(IConfiguration configuration, System.Net.Http.HttpClient httpClient)

        {

            _configuration = configuration;

​

            // customize the underlying HttpClient

            httpClient.DefaultRequestHeaders.Add("X-Custom-Header", "ScripsTwilioClient");

​

            _innerClient = new TwilioRestClient(

                configuration["Twilio:AccountSid"],

                configuration["Twilio:AuthToken"],

                httpClient: new SystemNetHttpClient(httpClient));

        }

​

        public Response Request(Request request) => _innerClient.Request(request);

        public Task<Response> RequestAsync(Request request) => _innerClient.RequestAsync(request);

        public string AccountSid => _innerClient.AccountSid;

        public string Region => _innerClient.Region;

        public HttpClient HttpClient => _innerClient.HttpClient;

​

        public async Task SendSMSAsync(IList<string> phoneNumbers, string message)

        {

            foreach (var phone in phoneNumbers)

            {

                MessageResource.Create

                    (

                        to: new PhoneNumber(phone),

                        from: new PhoneNumber(_configuration["Twilio:PhoneNumber"]),

                        body: message,

                        client: _innerClient

                    );

            }

​

            await Task.CompletedTask;

        }

​

        public async Task<RoomResource> CreateRoomAsync()

        {

            var roomName = DateTime.UtcNow.Ticks;

            return await RoomResource.CreateAsync(uniqueName: roomName.ToString(), client: _innerClient);

        }

​

        //public async Task<string> CreateTokenAsync(Guid userId, string roomName)

        //{

        //    // Create a video grant for the token

        //    var grant = new VideoGrant();

        //    grant.Room = roomName;

        //    var grants = new HashSet<IGrant> { grant };

​

        //    // Create an Access Token generator

        //    var token = new Token(AccountSid, api, apiKeySecret, identity: userId.ToString(), grants: grants);

​

        //    // Serialize the token as a JWT

        //    return token.ToJwt();

        //}

    }

public static IServiceCollection AddTwilio(this IServiceCollection services)

        {

            services.AddHttpClient<ITwilioClient, TwilioClient>();

            return services;

        }