DiunaBI/WebAPI/Controllers/PingController.cs

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace WebAPI.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    [Authorize]
    public class PingController : Controller
    {
        private readonly IConfiguration _configuration;
        public PingController(
        IConfiguration configuration)
        {
            _configuration = configuration;
        }

        [HttpGet]
        [Route("Ping")]
        [AllowAnonymous]
        public IActionResult Ping()
        {
            return Ok(_configuration["PONG"]);
        }
    }
}