dedicated-hosts-manager/DedicatedHostManagerClients/DedicatedHostClientHelpers/TokenHelper.cs

using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System;
using System.Threading.Tasks;

namespace DedicatedHostClientHelpers
{
    /// <summary>
    /// Gets an AAD token for ARM operations, used by Dedicated Hosts Manager testing clients.
    /// </summary>
    public class TokenHelper
    {
        public static async Task<string> GetToken(
            string authEndpoint,
            string azureRmEndpoint,
            string tenantId,
            string clientId,
            string clientSecret)
        {
            var authContext = new AuthenticationContext((new Uri(new Uri(authEndpoint), tenantId)).ToString());
            var credential = new ClientCredential(clientId, clientSecret);
            var token = await authContext.AcquireTokenAsync(azureRmEndpoint, credential);
            return token?.AccessToken;
        }
    }
}