yale-user-access/packages/backend/Services/SMSService.cs

using Microsoft.Extensions.Options;
using Serilog;
using Twilio;
using Twilio.Rest.Api.V2010.Account;
using YaleAccess.Models.Options;

namespace YaleAccess.Services
{
    public class SMSService
    {
        private readonly TwiloOptions _twiloOptions;

        public SMSService(IOptions<TwiloOptions> twiloOptions)
        {
            _twiloOptions = twiloOptions.Value;
        }

        public async Task SendCodeViaSMSAsync(string code, string phoneNumber)
        {
            // Create a Twilio client
            TwilioClient.Init(_twiloOptions.AccountSid, _twiloOptions.AuthToken);

            // Send the message
            var message = await MessageResource.CreateAsync(
                body: $"{_twiloOptions.Message} {code}",
                from: new Twilio.Types.PhoneNumber(_twiloOptions.FromNumber),
                to: new Twilio.Types.PhoneNumber(phoneNumber)
            );

            // Log the message
            Log.Logger.Information("SMS sent to {PhoneNumber} with message SID {MessageSid}.", phoneNumber, message.Sid);
            Log.Logger.Debug("SMS message: {MessageBody}", message.Body);
        }
    }
}