Disable the built-in OIDC claims mapping feature in the MVC sample

samples/Mvc.Client/Startup.cs

@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+using System.IdentityModel.Tokens.Jwt;
 using System.Net.Http;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authentication.OpenIdConnect;
@@ -45,6 +47,15 @@ namespace Mvc.Client
                 options.Scope.Add("email");
                 options.Scope.Add("roles");
                 options.Scope.Add("offline_access");
+
+                options.SecurityTokenValidator = new JwtSecurityTokenHandler
+                {
+                    // Disable the built-in JWT claims mapping feature.
+                    InboundClaimTypeMap = new Dictionary<string, string>()
+                };
+
+                options.TokenValidationParameters.NameClaimType = "name";
+                options.TokenValidationParameters.RoleClaimType = "role";
             });
 
             services.AddMvc();