hanyadikhetvan-dotnethf/HanyadikHetVan/Services/IdentityService.cs

using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace HanyadikHetVan.Services
{
    public class IdentityService
    {
        private readonly IHttpContextAccessor httpContextAccessor;

        public IdentityService(IHttpContextAccessor httpContextAccessor)
        {
            this.httpContextAccessor = httpContextAccessor;
        }

        public string GetUserId()
        {
            return
                httpContextAccessor.HttpContext.User.Claims
                .SingleOrDefault(x => x.Type.ToLower() == "sub")
                ?.Value ?? throw new Exception();
        }
    }
}