Context User does not return username Asp Net Core 3.1 C#

Question

I’m trying to get the username logged in by the User context inside a controller. I’m using Identity to manage login and JWT to authenticate requests in my controller. I can get the values: "User.Identity.Isauthenticated" and "User.Identity.Authenticationtype" normally, but "User.Identity.Name" always comes as null. The name is already stored in the bank normally.

I tried to take the Name another way, using Httpcontextaccessor:

Within the Configureservices() method of the Startup file:

// Obs: using Microsoft.AspNetCore.Http;
// Declarando o HttpContextAccessor na Startup para ser utilizado em
// outras partes do programa
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

Inside of my Controller:

    [Authorize]
    [Route("[controller]")]
    public class TesteController : ControllerBase
        {
            // Injetando o HttpContextAccessor no construtor:
            private readonly IHttpContextAccessor _httpAccessor;
    
            public TesteController(IHttpContextAccessor httpAccessor)
            {
                _httpAccessor = httpAccessor;
            }

            [HttpGet]
            public ActionResult Index()
            {
                // Sempre retorna null, assim como o User.Identity.Name
                return Ok(_httpAccessor.HttpContext.User.Identity.Name);
            }
        }