refactor: use Duende.IdentityModel

Author: cnblogs-dudu

src/AspNetIdentity/src/ResourceOwnerPasswordValidator.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
+// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
 
 
@@ -7,9 +7,7 @@
 using Microsoft.AspNetCore.Identity;
 using Microsoft.Extensions.Logging;
 using System.Threading.Tasks;
-using static IdentityModel.OidcConstants;
-using IdentityServer4.Services;
-using IdentityServer4.Events;
+using static Duende.IdentityModel.OidcConstants;
 
 namespace IdentityServer4.AspNetIdentity
 {