using Auth0.ManagementApi;
using System.Threading.Tasks;

public partial class Examples
{
    public async Task Example() {
        var client = new ManagementClient(
            token: "<token>"
        );

        await client.Guardian.Factors.Phone.GetTwilioProviderAsync();
    }

}

{
  "from": "+1223323",
  "messaging_service_sid": "5dEkAiHLPCuQ1uJj4qNXcAnERFAL6cpq",
  "auth_token": "zw5Ku6z2sxhd0ZVXto5SDHX6KPDByJPU",
  "sid": "wywA2BH4VqTpfywiDuyDAYZL3xQjoO40"
}