Switch to client_credentials grant type for the console demo project.

samples/MicroserviceDemo/applications/ConsoleClientDemo/appsettings.json

@@ -6,11 +6,9 @@
   },
   "IdentityClients": {
     "Default": {
-      "GrantType": "password",
+      "GrantType": "client_credentials",
       "ClientId": "console-client-demo",
       "ClientSecret": "1q2w3e*",
-      "UserName": "admin",
-      "UserPassword": "1q2w3E*",
       "Authority": "http://localhost:64999",
       "Scope": "InternalGateway IdentityService ProductService"
     }