Net Core 2.1 Bearer was not authenticated error in Controller

I am getting an error in net core 2.1:

Bearer was not authenticated.

Failure message: No SecurityTokenValidator available for token: null

The asp net output window is:

info: Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler[7] Bearer was not authenticated. Failure message: No SecurityTokenValidator available for token: null info: Microsoft.AspNetCore.Cors.Infrastructure.CorsService[4] Policy execution successful. 

The accounts controller code is here:

namespace quiz_backend.Controllers { public class Credentials { public string Email { get; set; } public string Password { get; set; } } [Produces("application/json")] [Route("api/Account")] public class AccountController : Controller { readonly UserManager<IdentityUser> userManager; readonly SignInManager<IdentityUser> signInManager; public AccountController(UserManager<IdentityUser> userManager, SignInManager<IdentityUser> signInManager) { this.userManager = userManager; this.signInManager = signInManager; } [HttpPost] public async Task<IActionResult> Register([FromBody] Credentials credentials) { var user = new IdentityUser { UserName = credentials.Email, Email = credentials.Email }; var result = await userManager.CreateAsync(user, credentials.Password); if (!result.Succeeded) return BadRequest(result.Errors); await signInManager.SignInAsync(user, isPersistent: false); // create a token var signingKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("this is the secret phrase")); var signingCredentials = new SigningCredentials(signingKey, SecurityAlgorithms.HmacSha256); var jwt = new JwtSecurityToken(signingCredentials: signingCredentials); return Ok(new JwtSecurityTokenHandler().WriteToken(jwt)); } } } 

Here is the startup.cs

namespace quiz_backend { public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { services.AddCors(options => options.AddPolicy("Cors", builder => { builder.AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader(); })); services.AddDbContext<QuizContext>(opt =>opt.UseInMemoryDatabase("quiz")); services.AddDbContext<UserDbContext>(opt => opt.UseInMemoryDatabase("user")); services.AddIdentity<IdentityUser, IdentityRole>().AddEntityFrameworkStores<UserDbContext>(); var signingKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("this is the secret phrase")); services.AddAuthentication(options =>{ options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme; options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme; }).AddJwtBearer(cfg => { cfg.RequireHttpsMetadata = false; cfg.SaveToken = true; cfg.TokenValidationParameters = new TokenValidationParameters() { IssuerSigningKey = signingKey, ValidateAudience = false, ValidateLifetime = false, ValidateIssuerSigningKey = true }; }); services.AddMvc(); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env) { app.UseAuthentication(); if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseCors("Cors"); app.UseMvc(); } } } 

This is the front end auth code to attach the token to the header in ts:

export class AuthInterceptor implements HttpInterceptor { constructor() {} intercept(req, next) { var token = localStorage.getItem('token') var authRequest = req.clone({ headers: req.headers.set('Authorization', `Bearer ${token}`) }) return next.handle(authRequest) } }