Once done, perform the same steps to add the TokenResponseViewModel, which is the POCO class hosting the parameters returned to the client by the server after a successful login:

using Newtonsoft.Json;

namespace TestMakerFreeWebApp.ViewModels
{
    [JsonObject(MemberSerialization.OptOut)]
    public class TokenResponseViewModel
    {
        #region Constructor
        public TokenResponseViewModel()
        {

        }
        #endregion

        #region Properties
        public string token { get; set; }
        public int expiration { get; set; }
        #endregion
    }
}

This concludes the ASP.NET Core part of our job. Before switching to Angular, we can spend some valuable time to briefly test it using Postman.