asp.net-core – 未配置身份验证处理程序来处理该方案：Microsof

User user = await _userManager.FindByEmailAsync(myEmail);

SignInResult result = await _signInManager.PasswordSignInAsync(user,myPassword,true,false);

我得到一个用户,但当我尝试登录用户时,我得到错误：

[Error] An unhandled exception has occurred while executing the request

System.InvalidOperationException：没有配置身份验证处理程序来处理该方案：Microsoft.AspNet.Identity.Application

在Web项目启动文件我有：

public void Configure(IApplicationBuilder applicationBuilder,IHostingEnvironment hostingEnvironment,ILoggerFactory loggerFactory) {

  // Other configuration code lines

  applicationBuilder.UseIISPlatformHandler(options => options.AuthenticationDescriptions.Clear());

  applicationBuilder.UseIdentity();

} // Configure

public void ConfigureServices(IServiceCollection services) {

  // Other configuration code lines

  services
    .AddIdentity<User,Role>()
    .AddEntityFrameworkStores<Context,Int32>()
    .AddDefaultTokenProviders();
}

我不知道出了什么问题.我试图改变配置,我总是得到同样的错误……

任何的想法？