ArgumentNullException: IDW10106: The 'ClientId' option must be provided

Question

0

I am creating Asp.Net core 6.0 web api application. I want to Azure AAD Authentication in my code, but it keeps giving me error : "ArgumentNullException: IDW10106: The 'ClientId' option must be provided."

appsettings.json

{
  "AzureAd": {
    "ClientId": "xxxxxxx-8820-xxxx-9e2f-xxxxxxx",
    "Instance": "https://login.microsoftonline.com/",
    "TenantId": "xxxxxxx-xxxx-xxx-xxx-xxxxx"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

startup.cs

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Identity.Web;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ConnectorsGateway
{
    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.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                .AddMicrosoftIdentityWebApi(Configuration, configSectionName: "AzureAd");
            services.AddControllers();
        }
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseHttpsRedirection();
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}

Answer 1

Hi @Deepak Pandey,

From the format of your config settings, it's related to secure an ASP.NET Core Web API.

And we can check this topic.

How to secure an ASP.NET Core Web API with the Microsoft identity platform

---

The appsettings.json should like below,:

{
  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",
    "Domain": "[Enter the domain of your tenant, e.g. contoso.onmicrosoft.com]",
    "TenantId": "[Enter 'common', or 'organizations' or the Tenant Id (Obtained from the Azure portal. Select 'Endpoints' from the 'App registrations' blade and use the GUID in any of the URLs), e.g. da41245a5-11b3-996c-00a8-4d99re19f292]",
    "ClientId": "[Enter the Client Id (Application ID obtained from the Azure portal), e.g. ba74781c2-53c2-442a-97c2-3d60re42f403]",
    "CallbackPath": "/signin-oidc",
    "SignedOutCallbackPath": "/signout-callback-oidc"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

You can choose one of sample for referring, Enable your Web app to sign-in users using the Microsoft Identity Platform.

If you have any questions, please let me know.

---

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Best regards,
Jason