问使用ASP.NET时的AddSignInManager核心MVC异常

EN

我正在使用ASP.NET CoreMVC3.0API项目。我使用的是Microsoft.AspNetCore.Identity v3.0

在Startup.cs中，在ConfigureServices方法中，当我键入下面的内容并运行应用程序时，会得到一个异常：

var builder = services.AddIdentityCore<AppUser>();
var identityBuilder = new IdentityBuilder(builder.UserType, builder.Services);
identityBuilder.AddEntityFrameworkStores<DataContext>();
identityBuilder.AddSignInManager<SignInManager<AppUser>>();

AppUser类如下所示：

using Microsoft.AspNetCore.Identity;

namespace Domain
{
    public class AppUser : IdentityUser
    {
        public string DisplayName { get; set; }
    }
}

我得到的例外是：

未处理异常。Microsoft.AspNetCore.Identity.ISecurityStampValidator :一些服务无法构造(在验证服务描述符'ServiceType: System.AggregateException生命期:作用域ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Authentication.ISystemClock' while attempting to activate 'Microsoft.AspNetCore.Identity.SecurityStampValidator1Domain.AppUser'.)时出错)(验证服务描述符‘Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator : Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Authentication.ISystemClock' while attempting to activate 'Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1Domain.AppUser'.)生命周期:作用域ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Authentication.ISystemClock' while attempting to activate 'Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1Domain.AppUser’.)时出错

验证服务描述符‘Microsoft.AspNetCore.Identity.ISecurityStampValidator :System.InvalidOperationException生命期:作用域ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Authentication.ISystemClock' while attempting to activate 'Microsoft.AspNetCore.Identity.SecurityStampValidator1Domain.AppUser'.时出错

'Microsoft.AspNetCore.Authentication.ISystemClock‘：当试图激活'Microsoft.AspNetCore.Identity.SecurityStampValidator1[Domain.AppUser]'. at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(Type serviceType, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, Type serviceType, Type implementationType, CallSiteChain callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, Type serviceType, CallSiteChain callSiteChain, Int32 slot) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceDescriptor serviceDescriptor, CallSiteChain callSiteChain) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor) --- End of inner exception stack trace --- at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor) at Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable1 serviceDescriptors、ServiceProviderOptions选项时，无法解析System.InvalidOperationException类型的服务)

-内部异常堆栈跟踪结束

( Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable1 serviceDescriptors, ServiceProviderOptions options) at Microsoft.Extensions.DependencyInjection.ServiceCollectionContainerBuilderExtensions.BuildServiceProvider(IServiceCollection services, ServiceProviderOptions options) at Microsoft.Extensions.DependencyInjection.DefaultServiceProviderFactory.CreateServiceProvider(IServiceCollection containerBuilder) at Microsoft.Extensions.Hosting.Internal.ServiceFactoryAdapter1.CreateServiceProvider(Object containerBuilder) at Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build() at Api.Program.Main(String[] args) in C:\Projects\XXXXXXXX\api\Program.cs:line 19 ->(内部异常#1) System.InvalidOperationException: Error，同时验证服务描述符'ServiceType: Microsoft.AspNetCore.IdentityMicrosoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Authentication.ISystemClock' while attempting to activate 'Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1Domain.AppUser'.：.ITwoFactorSecurityStampValidator生命周期:作用域ImplementationType：

知道我做错了什么吗？