Authentication cookie not being read when using [Authorize] attribute

Question

I need help configuring my asp.net application using cookie authentication. This is what my configuration looks like:

public void ConfigureAuth(IAppBuilder app)
{
    app.CreatePerOwinContext(ApplicationDbContext.Create);
    app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

    app.UseCookieAuthentication(new CookieAuthenticationOptions()
    {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        CookieSecure = CookieSecureOption.SameAsRequest,
    });

    app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

    PublicClientId = "self";
    OAuthOptions = new OAuthAuthorizationServerOptions
    {
        TokenEndpointPath = new PathString("/Token"),
        Provider = new ApplicationOAuthProvider(PublicClientId),
        AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
        AccessTokenExpireTimeSpan = TimeSpan.FromDays(14),
        AllowInsecureHttp = true
    };

    app.UseOAuthBearerTokens(OAuthOptions);
}

My login api route is:

[Route("Login")]
[HttpPost]
[AllowAnonymous]
public IHttpActionResult Login(RegisterBindingModel model)
{
    var user = UserManager.Find(model.Username, model.Password);

    if (user != null)
    {
        Authentication.SignOut();
        var identity = UserManager.CreateIdentity(user, DefaultAuthenticationTypes.ApplicationCookie);
        identity.AddClaim(new Claim(ClaimTypes.Role, "IsAdmin"));
        Authentication.SignIn(new AuthenticationProperties() { IsPersistent = true }, identity);

        return Ok("Success");
    }

    return Ok();
}

Calling login returns a cookie named .AspNet.ApplicationCookie but when I call the logout action:

[Route("Logout")]
[HttpPost]
public IHttpActionResult Logout()
{               
    Authentication.SignOut(CookieAuthenticationDefaults.AuthenticationType);
    return Ok();
}

I get the following error: Authorization has been denied for this request

What am I doing wrong?

Note: I decorated the controller with the [Authorize] attribute

Answer 1

Looking at my Web API config settings only to realize that it was only configured to allow bearer tokens. I removed the call to SuppressDefaultHostAuthentication and everything works fine now.