Named connection strings are only supported when using 'IConfiguration' and a service provider

could you please tel me what i am doing wrong?

SCAFOLD DBCONTEXT

Scaffold-DbContext -Connection name=DbAsp Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models -f

CONFIGURESERVICES

public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });
            
            services.AddDbContext<aspContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("DbAsp")));

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

ASPCONTEXT.CS

public partial class aspContext : DbContext
    {
        public aspContext()
        {
        }

        public aspContext(DbContextOptions<aspContext> options)
            : base(options)
        {
        }
		
		...
}

EXCEPTION

InvalidOperationException: A named connection string was used, but the name ‘DbAsp’ was not found in the application’s configuration. Note that named connection strings are only supported when using ‘IConfiguration’ and a service provider, such as in a typical ASP.NET Core application. See https://go.microsoft.com/fwlink/?linkid=850912 for more information.

APPSETTINGS.JSON

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },

  "AllowedHosts": "*",

  "ConnectionStrings": {
    "DbAsp": "Server=xxx;Database=xyz;integrated security=True;"
  }
}

Exception message: Stack trace: A named connection string was used, but the name ‘DbAsp’ was not found in the application’s configuration. Note that named connection strings are only supported when using ‘IConfiguration’ and a service provider, such as in a typical ASP.NET Core application. See https://go.microsoft.com/fwlink/?linkid=850912 for more information

Further technical details

EF Core version: (found in project.csproj or packages.config) Database Provider: (e.g. Microsoft.EntityFrameworkCore.SqlServer) Operating system: IDE: (e.g. Visual Studio 15.7.2) .NET CORE 2.2 release 3